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Finding the Fourth Proportional to 717,901.30, 990,701.73 and 395,611.30

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Solution

The fourth proportional to 717,901.30, 990,701.73 and 395,611.30 is: 545,942.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,901.30 : 990,701.73 = 395,611.30 : x
  2. Step 2: Convert to fraction form
    717,901.30/990,701.73 = 395,611.30/x
  3. Step 3: Cross multiply
    717,901.30x = 990,701.73 × 395,611.30
  4. Step 4: Simplify right side
    717,901.30x = 391,932,799,317.55
  5. Step 5: Solve for x
    x = 391,932,799,317.55/717,901.30
  6. Step 6: Final answer
    x = 545,942.46

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Double scale
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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.