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Finding the Fourth Proportional to 655.50, 898.04 and 630.90

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Solution

The fourth proportional to 655.50, 898.04 and 630.90 is: 864.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.50 : 898.04 = 630.90 : x
  2. Step 2: Convert to fraction form
    655.50/898.04 = 630.90/x
  3. Step 3: Cross multiply
    655.50x = 898.04 × 630.90
  4. Step 4: Simplify right side
    655.50x = 566,573.44
  5. Step 5: Solve for x
    x = 566,573.44/655.50
  6. Step 6: Final answer
    x = 864.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.