Home / 381,258.47-571,488.65-128,451.61

Finding the Fourth Proportional to 381,258.47, 571,488.65 and 128,451.61

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Solution

The fourth proportional to 381,258.47, 571,488.65 and 128,451.61 is: 192,542.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,258.47 : 571,488.65 = 128,451.61 : x
  2. Step 2: Convert to fraction form
    381,258.47/571,488.65 = 128,451.61/x
  3. Step 3: Cross multiply
    381,258.47x = 571,488.65 × 128,451.61
  4. Step 4: Simplify right side
    381,258.47x = 73,408,633,689.53
  5. Step 5: Solve for x
    x = 73,408,633,689.53/381,258.47
  6. Step 6: Final answer
    x = 192,542.96

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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.