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Finding the Fourth Proportional to 502,463.80, 753,695.70 and 128,486.80

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Solution

The fourth proportional to 502,463.80, 753,695.70 and 128,486.80 is: 192,730.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,463.80 : 753,695.70 = 128,486.80 : x
  2. Step 2: Convert to fraction form
    502,463.80/753,695.70 = 128,486.80/x
  3. Step 3: Cross multiply
    502,463.80x = 753,695.70 × 128,486.80
  4. Step 4: Simplify right side
    502,463.80x = 96,839,948,666.76
  5. Step 5: Solve for x
    x = 96,839,948,666.76/502,463.80
  6. Step 6: Final answer
    x = 192,730.20

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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.