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Finding the Fourth Proportional to 1,250.12, 1,874.16 and 763.01

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Solution

The fourth proportional to 1,250.12, 1,874.16 and 763.01 is: 1,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.12 : 1,874.16 = 763.01 : x
  2. Step 2: Convert to fraction form
    1,250.12/1,874.16 = 763.01/x
  3. Step 3: Cross multiply
    1,250.12x = 1,874.16 × 763.01
  4. Step 4: Simplify right side
    1,250.12x = 1,429,993.45
  5. Step 5: Solve for x
    x = 1,429,993.45/1,250.12
  6. Step 6: Final answer
    x = 1,143.89

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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.