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Finding the Fourth Proportional to 655.28, 903.52 and 445.29

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Solution

The fourth proportional to 655.28, 903.52 and 445.29 is: 613.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.28 : 903.52 = 445.29 : x
  2. Step 2: Convert to fraction form
    655.28/903.52 = 445.29/x
  3. Step 3: Cross multiply
    655.28x = 903.52 × 445.29
  4. Step 4: Simplify right side
    655.28x = 402,328.42
  5. Step 5: Solve for x
    x = 402,328.42/655.28
  6. Step 6: Final answer
    x = 613.98

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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.