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Finding the Fourth Proportional to 487,627.80, 731,441.70 and 310,918.20

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Solution

The fourth proportional to 487,627.80, 731,441.70 and 310,918.20 is: 466,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,627.80 : 731,441.70 = 310,918.20 : x
  2. Step 2: Convert to fraction form
    487,627.80/731,441.70 = 310,918.20/x
  3. Step 3: Cross multiply
    487,627.80x = 731,441.70 × 310,918.20
  4. Step 4: Simplify right side
    487,627.80x = 227,418,536,768.94
  5. Step 5: Solve for x
    x = 227,418,536,768.94/487,627.80
  6. Step 6: Final answer
    x = 466,377.30

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.