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Finding the Fourth Proportional to 425,488.35, 638,239.14 and 125,999.22

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Solution

The fourth proportional to 425,488.35, 638,239.14 and 125,999.22 is: 189,000.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,488.35 : 638,239.14 = 125,999.22 : x
  2. Step 2: Convert to fraction form
    425,488.35/638,239.14 = 125,999.22/x
  3. Step 3: Cross multiply
    425,488.35x = 638,239.14 × 125,999.22
  4. Step 4: Simplify right side
    425,488.35x = 80,417,633,813.47
  5. Step 5: Solve for x
    x = 80,417,633,813.47/425,488.35
  6. Step 6: Final answer
    x = 189,000.79

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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.