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Finding the Fourth Proportional to 629.74, 869.40 and 560.54

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Solution

The fourth proportional to 629.74, 869.40 and 560.54 is: 773.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.74 : 869.40 = 560.54 : x
  2. Step 2: Convert to fraction form
    629.74/869.40 = 560.54/x
  3. Step 3: Cross multiply
    629.74x = 869.40 × 560.54
  4. Step 4: Simplify right side
    629.74x = 487,333.48
  5. Step 5: Solve for x
    x = 487,333.48/629.74
  6. Step 6: Final answer
    x = 773.86

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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.