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Finding the Fourth Proportional to 622.48, 860.16 and 474.88

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Solution

The fourth proportional to 622.48, 860.16 and 474.88 is: 656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.48 : 860.16 = 474.88 : x
  2. Step 2: Convert to fraction form
    622.48/860.16 = 474.88/x
  3. Step 3: Cross multiply
    622.48x = 860.16 × 474.88
  4. Step 4: Simplify right side
    622.48x = 408,472.78
  5. Step 5: Solve for x
    x = 408,472.78/622.48
  6. Step 6: Final answer
    x = 656.20

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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.