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Finding the Fourth Proportional to 283,711.96, 391,522.40 and 156,389.68

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Solution

The fourth proportional to 283,711.96, 391,522.40 and 156,389.68 is: 215,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,711.96 : 391,522.40 = 156,389.68 : x
  2. Step 2: Convert to fraction form
    283,711.96/391,522.40 = 156,389.68/x
  3. Step 3: Cross multiply
    283,711.96x = 391,522.40 × 156,389.68
  4. Step 4: Simplify right side
    283,711.96x = 61,230,062,848.83
  5. Step 5: Solve for x
    x = 61,230,062,848.83/283,711.96
  6. Step 6: Final answer
    x = 215,817.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.