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Finding the Fourth Proportional to 1,251.49, 1,876.67 and 520.63

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Solution

The fourth proportional to 1,251.49, 1,876.67 and 520.63 is: 780.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.49 : 1,876.67 = 520.63 : x
  2. Step 2: Convert to fraction form
    1,251.49/1,876.67 = 520.63/x
  3. Step 3: Cross multiply
    1,251.49x = 1,876.67 × 520.63
  4. Step 4: Simplify right side
    1,251.49x = 977,048.10
  5. Step 5: Solve for x
    x = 977,048.10/1,251.49
  6. Step 6: Final answer
    x = 780.71

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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.