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Finding the Fourth Proportional to 440.55, 608.08 and 291.28

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Solution

The fourth proportional to 440.55, 608.08 and 291.28 is: 402.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.55 : 608.08 = 291.28 : x
  2. Step 2: Convert to fraction form
    440.55/608.08 = 291.28/x
  3. Step 3: Cross multiply
    440.55x = 608.08 × 291.28
  4. Step 4: Simplify right side
    440.55x = 177,121.54
  5. Step 5: Solve for x
    x = 177,121.54/440.55
  6. Step 6: Final answer
    x = 402.05

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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.