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Finding the Fourth Proportional to 579,864.60, 869,796.90 and 159,139.80

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Solution

The fourth proportional to 579,864.60, 869,796.90 and 159,139.80 is: 238,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,864.60 : 869,796.90 = 159,139.80 : x
  2. Step 2: Convert to fraction form
    579,864.60/869,796.90 = 159,139.80/x
  3. Step 3: Cross multiply
    579,864.60x = 869,796.90 × 159,139.80
  4. Step 4: Simplify right side
    579,864.60x = 138,419,304,706.62
  5. Step 5: Solve for x
    x = 138,419,304,706.62/579,864.60
  6. Step 6: Final answer
    x = 238,709.70

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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.