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Finding the Fourth Proportional to 1,250.57, 1,875.15 and 519.75

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Solution

The fourth proportional to 1,250.57, 1,875.15 and 519.75 is: 779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.57 : 1,875.15 = 519.75 : x
  2. Step 2: Convert to fraction form
    1,250.57/1,875.15 = 519.75/x
  3. Step 3: Cross multiply
    1,250.57x = 1,875.15 × 519.75
  4. Step 4: Simplify right side
    1,250.57x = 974,609.21
  5. Step 5: Solve for x
    x = 974,609.21/1,250.57
  6. Step 6: Final answer
    x = 779.33

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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.