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Finding the Fourth Proportional to 440.56, 655.29 and 439.08

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Solution

The fourth proportional to 440.56, 655.29 and 439.08 is: 653.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.56 : 655.29 = 439.08 : x
  2. Step 2: Convert to fraction form
    440.56/655.29 = 439.08/x
  3. Step 3: Cross multiply
    440.56x = 655.29 × 439.08
  4. Step 4: Simplify right side
    440.56x = 287,724.73
  5. Step 5: Solve for x
    x = 287,724.73/440.56
  6. Step 6: Final answer
    x = 653.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.