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Finding the Fourth Proportional to 1,251.17, 1,876.39 and 470.61

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Solution

The fourth proportional to 1,251.17, 1,876.39 and 470.61 is: 705.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.17 : 1,876.39 = 470.61 : x
  2. Step 2: Convert to fraction form
    1,251.17/1,876.39 = 470.61/x
  3. Step 3: Cross multiply
    1,251.17x = 1,876.39 × 470.61
  4. Step 4: Simplify right side
    1,251.17x = 883,040.85
  5. Step 5: Solve for x
    x = 883,040.85/1,251.17
  6. Step 6: Final answer
    x = 705.77

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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.