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Finding the Fourth Proportional to 717,946.74, 990,770.40 and 411,998.76

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Solution

The fourth proportional to 717,946.74, 990,770.40 and 411,998.76 is: 568,560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,946.74 : 990,770.40 = 411,998.76 : x
  2. Step 2: Convert to fraction form
    717,946.74/990,770.40 = 411,998.76/x
  3. Step 3: Cross multiply
    717,946.74x = 990,770.40 × 411,998.76
  4. Step 4: Simplify right side
    717,946.74x = 408,196,176,244.70
  5. Step 5: Solve for x
    x = 408,196,176,244.70/717,946.74
  6. Step 6: Final answer
    x = 568,560.53

Related Problems

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Half scale
Find fourth proportional to 1,435,893.48, 1,981,540.80 and 823,997.52
Double scale
Find fourth proportional to 717,947.74, 990,771.78 and 411,999.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.