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Finding the Fourth Proportional to 1,248.39, 1,872.86 and 632.43

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Solution

The fourth proportional to 1,248.39, 1,872.86 and 632.43 is: 948.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.39 : 1,872.86 = 632.43 : x
  2. Step 2: Convert to fraction form
    1,248.39/1,872.86 = 632.43/x
  3. Step 3: Cross multiply
    1,248.39x = 1,872.86 × 632.43
  4. Step 4: Simplify right side
    1,248.39x = 1,184,449.69
  5. Step 5: Solve for x
    x = 1,184,449.69/1,248.39
  6. Step 6: Final answer
    x = 948.78

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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.