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Finding the Fourth Proportional to 629.72, 939.80 and 587.95

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Solution

The fourth proportional to 629.72, 939.80 and 587.95 is: 877.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.72 : 939.80 = 587.95 : x
  2. Step 2: Convert to fraction form
    629.72/939.80 = 587.95/x
  3. Step 3: Cross multiply
    629.72x = 939.80 × 587.95
  4. Step 4: Simplify right side
    629.72x = 552,554.53
  5. Step 5: Solve for x
    x = 552,554.53/629.72
  6. Step 6: Final answer
    x = 877.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.