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Finding the Fourth Proportional to 486,239.40, 729,359.10 and 307,780.20

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Solution

The fourth proportional to 486,239.40, 729,359.10 and 307,780.20 is: 461,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,239.40 : 729,359.10 = 307,780.20 : x
  2. Step 2: Convert to fraction form
    486,239.40/729,359.10 = 307,780.20/x
  3. Step 3: Cross multiply
    486,239.40x = 729,359.10 × 307,780.20
  4. Step 4: Simplify right side
    486,239.40x = 224,482,289,669.82
  5. Step 5: Solve for x
    x = 224,482,289,669.82/486,239.40
  6. Step 6: Final answer
    x = 461,670.30

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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.