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Finding the Fourth Proportional to 694.08, 1,040.72 and 591.20

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Solution

The fourth proportional to 694.08, 1,040.72 and 591.20 is: 886.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.08 : 1,040.72 = 591.20 : x
  2. Step 2: Convert to fraction form
    694.08/1,040.72 = 591.20/x
  3. Step 3: Cross multiply
    694.08x = 1,040.72 × 591.20
  4. Step 4: Simplify right side
    694.08x = 615,273.66
  5. Step 5: Solve for x
    x = 615,273.66/694.08
  6. Step 6: Final answer
    x = 886.46

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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.