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Finding the Fourth Proportional to 629.70, 866.58 and 542.22

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Solution

The fourth proportional to 629.70, 866.58 and 542.22 is: 746.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.70 : 866.58 = 542.22 : x
  2. Step 2: Convert to fraction form
    629.70/866.58 = 542.22/x
  3. Step 3: Cross multiply
    629.70x = 866.58 × 542.22
  4. Step 4: Simplify right side
    629.70x = 469,877.01
  5. Step 5: Solve for x
    x = 469,877.01/629.70
  6. Step 6: Final answer
    x = 746.19

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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.