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Finding the Fourth Proportional to 391,572.19, 587,620.75 and 251,429.23

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Solution

The fourth proportional to 391,572.19, 587,620.75 and 251,429.23 is: 377,312.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,572.19 : 587,620.75 = 251,429.23 : x
  2. Step 2: Convert to fraction form
    391,572.19/587,620.75 = 251,429.23/x
  3. Step 3: Cross multiply
    391,572.19x = 587,620.75 × 251,429.23
  4. Step 4: Simplify right side
    391,572.19x = 147,745,032,704.52
  5. Step 5: Solve for x
    x = 147,745,032,704.52/391,572.19
  6. Step 6: Final answer
    x = 377,312.37

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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.