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Finding the Fourth Proportional to 865.95, 1,195.04 and 487.91

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Solution

The fourth proportional to 865.95, 1,195.04 and 487.91 is: 673.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.95 : 1,195.04 = 487.91 : x
  2. Step 2: Convert to fraction form
    865.95/1,195.04 = 487.91/x
  3. Step 3: Cross multiply
    865.95x = 1,195.04 × 487.91
  4. Step 4: Simplify right side
    865.95x = 583,069.45
  5. Step 5: Solve for x
    x = 583,069.45/865.95
  6. Step 6: Final answer
    x = 673.33

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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.