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Finding the Fourth Proportional to 655.88, 987.73 and 591.62

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Solution

The fourth proportional to 655.88, 987.73 and 591.62 is: 890.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.88 : 987.73 = 591.62 : x
  2. Step 2: Convert to fraction form
    655.88/987.73 = 591.62/x
  3. Step 3: Cross multiply
    655.88x = 987.73 × 591.62
  4. Step 4: Simplify right side
    655.88x = 584,357.86
  5. Step 5: Solve for x
    x = 584,357.86/655.88
  6. Step 6: Final answer
    x = 890.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.