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Finding the Fourth Proportional to 1,058.72, 1,459.62 and 868.97

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Solution

The fourth proportional to 1,058.72, 1,459.62 and 868.97 is: 1,198.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.72 : 1,459.62 = 868.97 : x
  2. Step 2: Convert to fraction form
    1,058.72/1,459.62 = 868.97/x
  3. Step 3: Cross multiply
    1,058.72x = 1,459.62 × 868.97
  4. Step 4: Simplify right side
    1,058.72x = 1,268,358.69
  5. Step 5: Solve for x
    x = 1,268,358.69/1,058.72
  6. Step 6: Final answer
    x = 1,198.02

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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.