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Finding the Fourth Proportional to 391,999,796.60, 588,088,279.53 and 129,683,732.27

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Solution

The fourth proportional to 391,999,796.60, 588,088,279.53 and 129,683,732.27 is: 194,554,904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,999,796.60 : 588,088,279.53 = 129,683,732.27 : x
  2. Step 2: Convert to fraction form
    391,999,796.60/588,088,279.53 = 129,683,732.27/x
  3. Step 3: Cross multiply
    391,999,796.60x = 588,088,279.53 × 129,683,732.27
  4. Step 4: Simplify right side
    391,999,796.60x = 76,265,482,990,752,992
  5. Step 5: Solve for x
    x = 76,265,482,990,752,992/391,999,796.60
  6. Step 6: Final answer
    x = 194,554,904.50

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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.