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Finding the Fourth Proportional to 655.56, 989.16 and 630.24

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Solution

The fourth proportional to 655.56, 989.16 and 630.24 is: 950.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 989.16 = 630.24 : x
  2. Step 2: Convert to fraction form
    655.56/989.16 = 630.24/x
  3. Step 3: Cross multiply
    655.56x = 989.16 × 630.24
  4. Step 4: Simplify right side
    655.56x = 623,408.20
  5. Step 5: Solve for x
    x = 623,408.20/655.56
  6. Step 6: Final answer
    x = 950.96

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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.