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Finding the Fourth Proportional to 1,251.01, 1,726.14 and 919.72

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Solution

The fourth proportional to 1,251.01, 1,726.14 and 919.72 is: 1,269.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.01 : 1,726.14 = 919.72 : x
  2. Step 2: Convert to fraction form
    1,251.01/1,726.14 = 919.72/x
  3. Step 3: Cross multiply
    1,251.01x = 1,726.14 × 919.72
  4. Step 4: Simplify right side
    1,251.01x = 1,587,565.48
  5. Step 5: Solve for x
    x = 1,587,565.48/1,251.01
  6. Step 6: Final answer
    x = 1,269.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.