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Finding the Fourth Proportional to 1,251.84, 1,877.37 and 429.92

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Solution

The fourth proportional to 1,251.84, 1,877.37 and 429.92 is: 644.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.84 : 1,877.37 = 429.92 : x
  2. Step 2: Convert to fraction form
    1,251.84/1,877.37 = 429.92/x
  3. Step 3: Cross multiply
    1,251.84x = 1,877.37 × 429.92
  4. Step 4: Simplify right side
    1,251.84x = 807,114.95
  5. Step 5: Solve for x
    x = 807,114.95/1,251.84
  6. Step 6: Final answer
    x = 644.74

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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.