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Finding the Fourth Proportional to 717,770.25, 990,310.46 and 427,148.84

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Solution

The fourth proportional to 717,770.25, 990,310.46 and 427,148.84 is: 589,338.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,770.25 : 990,310.46 = 427,148.84 : x
  2. Step 2: Convert to fraction form
    717,770.25/990,310.46 = 427,148.84/x
  3. Step 3: Cross multiply
    717,770.25x = 990,310.46 × 427,148.84
  4. Step 4: Simplify right side
    717,770.25x = 423,009,958,998.40
  5. Step 5: Solve for x
    x = 423,009,958,998.40/717,770.25
  6. Step 6: Final answer
    x = 589,338.94

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Double scale
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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.