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Finding the Fourth Proportional to 867.89, 1,197.68 and 474.90

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Solution

The fourth proportional to 867.89, 1,197.68 and 474.90 is: 655.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.89 : 1,197.68 = 474.90 : x
  2. Step 2: Convert to fraction form
    867.89/1,197.68 = 474.90/x
  3. Step 3: Cross multiply
    867.89x = 1,197.68 × 474.90
  4. Step 4: Simplify right side
    867.89x = 568,775.86
  5. Step 5: Solve for x
    x = 568,775.86/867.89
  6. Step 6: Final answer
    x = 655.36

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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.