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Finding the Fourth Proportional to 1,250.84, 1,876.68 and 429.68

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Solution

The fourth proportional to 1,250.84, 1,876.68 and 429.68 is: 644.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.84 : 1,876.68 = 429.68 : x
  2. Step 2: Convert to fraction form
    1,250.84/1,876.68 = 429.68/x
  3. Step 3: Cross multiply
    1,250.84x = 1,876.68 × 429.68
  4. Step 4: Simplify right side
    1,250.84x = 806,371.86
  5. Step 5: Solve for x
    x = 806,371.86/1,250.84
  6. Step 6: Final answer
    x = 644.66

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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.