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Finding the Fourth Proportional to 865.55, 1,297.62 and 454.28

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Solution

The fourth proportional to 865.55, 1,297.62 and 454.28 is: 681.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.55 : 1,297.62 = 454.28 : x
  2. Step 2: Convert to fraction form
    865.55/1,297.62 = 454.28/x
  3. Step 3: Cross multiply
    865.55x = 1,297.62 × 454.28
  4. Step 4: Simplify right side
    865.55x = 589,476.33
  5. Step 5: Solve for x
    x = 589,476.33/865.55
  6. Step 6: Final answer
    x = 681.04

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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.