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Finding the Fourth Proportional to 520,780.88, 781,171.32 and 494,186.96

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Solution

The fourth proportional to 520,780.88, 781,171.32 and 494,186.96 is: 741,280.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,780.88 : 781,171.32 = 494,186.96 : x
  2. Step 2: Convert to fraction form
    520,780.88/781,171.32 = 494,186.96/x
  3. Step 3: Cross multiply
    520,780.88x = 781,171.32 × 494,186.96
  4. Step 4: Simplify right side
    520,780.88x = 386,044,679,869.99
  5. Step 5: Solve for x
    x = 386,044,679,869.99/520,780.88
  6. Step 6: Final answer
    x = 741,280.44

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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.