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Finding the Fourth Proportional to 283,711.88, 391,522.46 and 156,390.28

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Solution

The fourth proportional to 283,711.88, 391,522.46 and 156,390.28 is: 215,818.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,711.88 : 391,522.46 = 156,390.28 : x
  2. Step 2: Convert to fraction form
    283,711.88/391,522.46 = 156,390.28/x
  3. Step 3: Cross multiply
    283,711.88x = 391,522.46 × 156,390.28
  4. Step 4: Simplify right side
    283,711.88x = 61,230,307,145.69
  5. Step 5: Solve for x
    x = 61,230,307,145.69/283,711.88
  6. Step 6: Final answer
    x = 215,818.62

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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.