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Finding the Fourth Proportional to 655.80, 905.96 and 524.64

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Solution

The fourth proportional to 655.80, 905.96 and 524.64 is: 724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.80 : 905.96 = 524.64 : x
  2. Step 2: Convert to fraction form
    655.80/905.96 = 524.64/x
  3. Step 3: Cross multiply
    655.80x = 905.96 × 524.64
  4. Step 4: Simplify right side
    655.80x = 475,302.85
  5. Step 5: Solve for x
    x = 475,302.85/655.80
  6. Step 6: Final answer
    x = 724.77

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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.