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Finding the Fourth Proportional to 283,332, 391,000.76 and 156,012.15

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Solution

The fourth proportional to 283,332, 391,000.76 and 156,012.15 is: 215,298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,332 : 391,000.76 = 156,012.15 : x
  2. Step 2: Convert to fraction form
    283,332/391,000.76 = 156,012.15/x
  3. Step 3: Cross multiply
    283,332x = 391,000.76 × 156,012.15
  4. Step 4: Simplify right side
    283,332x = 61,000,868,439.17
  5. Step 5: Solve for x
    x = 61,000,868,439.17/283,332
  6. Step 6: Final answer
    x = 215,298.20

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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.