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Finding the Fourth Proportional to 425,319.52, 638,104 and 125,808

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Solution

The fourth proportional to 425,319.52, 638,104 and 125,808 is: 188,748.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,319.52 : 638,104 = 125,808 : x
  2. Step 2: Convert to fraction form
    425,319.52/638,104 = 125,808/x
  3. Step 3: Cross multiply
    425,319.52x = 638,104 × 125,808
  4. Step 4: Simplify right side
    425,319.52x = 80,278,588,032
  5. Step 5: Solve for x
    x = 80,278,588,032/425,319.52
  6. Step 6: Final answer
    x = 188,748.89

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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.