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Finding the Fourth Proportional to 847.97, 1,170.15 and 474.89

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Solution

The fourth proportional to 847.97, 1,170.15 and 474.89 is: 655.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.97 : 1,170.15 = 474.89 : x
  2. Step 2: Convert to fraction form
    847.97/1,170.15 = 474.89/x
  3. Step 3: Cross multiply
    847.97x = 1,170.15 × 474.89
  4. Step 4: Simplify right side
    847.97x = 555,695.46
  5. Step 5: Solve for x
    x = 555,695.46/847.97
  6. Step 6: Final answer
    x = 655.32

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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.