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Finding the Fourth Proportional to 431,488.74, 646,378.74 and 203,472.12

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Solution

The fourth proportional to 431,488.74, 646,378.74 and 203,472.12 is: 304,805.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,488.74 : 646,378.74 = 203,472.12 : x
  2. Step 2: Convert to fraction form
    431,488.74/646,378.74 = 203,472.12/x
  3. Step 3: Cross multiply
    431,488.74x = 646,378.74 × 203,472.12
  4. Step 4: Simplify right side
    431,488.74x = 131,520,052,550.73
  5. Step 5: Solve for x
    x = 131,520,052,550.73/431,488.74
  6. Step 6: Final answer
    x = 304,805.29

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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.