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Finding the Fourth Proportional to 655.34, 905.50 and 487.04

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Solution

The fourth proportional to 655.34, 905.50 and 487.04 is: 672.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.34 : 905.50 = 487.04 : x
  2. Step 2: Convert to fraction form
    655.34/905.50 = 487.04/x
  3. Step 3: Cross multiply
    655.34x = 905.50 × 487.04
  4. Step 4: Simplify right side
    655.34x = 441,014.72
  5. Step 5: Solve for x
    x = 441,014.72/655.34
  6. Step 6: Final answer
    x = 672.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.