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Finding the Fourth Proportional to 865.07, 1,192.08 and 615.95

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Solution

The fourth proportional to 865.07, 1,192.08 and 615.95 is: 848.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.07 : 1,192.08 = 615.95 : x
  2. Step 2: Convert to fraction form
    865.07/1,192.08 = 615.95/x
  3. Step 3: Cross multiply
    865.07x = 1,192.08 × 615.95
  4. Step 4: Simplify right side
    865.07x = 734,261.68
  5. Step 5: Solve for x
    x = 734,261.68/865.07
  6. Step 6: Final answer
    x = 848.79

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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.