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Finding the Fourth Proportional to 629.13, 942.35 and 611.85

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Solution

The fourth proportional to 629.13, 942.35 and 611.85 is: 916.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.13 : 942.35 = 611.85 : x
  2. Step 2: Convert to fraction form
    629.13/942.35 = 611.85/x
  3. Step 3: Cross multiply
    629.13x = 942.35 × 611.85
  4. Step 4: Simplify right side
    629.13x = 576,580.76
  5. Step 5: Solve for x
    x = 576,580.76/629.13
  6. Step 6: Final answer
    x = 916.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.