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Finding the Fourth Proportional to 865.70, 1,298.55 and 736.10

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Solution

The fourth proportional to 865.70, 1,298.55 and 736.10 is: 1,104.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.70 : 1,298.55 = 736.10 : x
  2. Step 2: Convert to fraction form
    865.70/1,298.55 = 736.10/x
  3. Step 3: Cross multiply
    865.70x = 1,298.55 × 736.10
  4. Step 4: Simplify right side
    865.70x = 955,862.66
  5. Step 5: Solve for x
    x = 955,862.66/865.70
  6. Step 6: Final answer
    x = 1,104.15

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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.