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Finding the Fourth Proportional to 391,790.52, 587,639.58 and 107,509.82

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Solution

The fourth proportional to 391,790.52, 587,639.58 and 107,509.82 is: 161,252.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,790.52 : 587,639.58 = 107,509.82 : x
  2. Step 2: Convert to fraction form
    391,790.52/587,639.58 = 107,509.82/x
  3. Step 3: Cross multiply
    391,790.52x = 587,639.58 × 107,509.82
  4. Step 4: Simplify right side
    391,790.52x = 63,177,022,532.48
  5. Step 5: Solve for x
    x = 63,177,022,532.48/391,790.52
  6. Step 6: Final answer
    x = 161,252.04

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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.