Home / 219,490.38-329,084.28-86,385.92

Finding the Fourth Proportional to 219,490.38, 329,084.28 and 86,385.92

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Solution

The fourth proportional to 219,490.38, 329,084.28 and 86,385.92 is: 129,519.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,490.38 : 329,084.28 = 86,385.92 : x
  2. Step 2: Convert to fraction form
    219,490.38/329,084.28 = 86,385.92/x
  3. Step 3: Cross multiply
    219,490.38x = 329,084.28 × 86,385.92
  4. Step 4: Simplify right side
    219,490.38x = 28,428,246,639.92
  5. Step 5: Solve for x
    x = 28,428,246,639.92/219,490.38
  6. Step 6: Final answer
    x = 129,519.33

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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.