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Finding the Fourth Proportional to 440.17, 663.49 and 403.19

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Solution

The fourth proportional to 440.17, 663.49 and 403.19 is: 607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.17 : 663.49 = 403.19 : x
  2. Step 2: Convert to fraction form
    440.17/663.49 = 403.19/x
  3. Step 3: Cross multiply
    440.17x = 663.49 × 403.19
  4. Step 4: Simplify right side
    440.17x = 267,515.94
  5. Step 5: Solve for x
    x = 267,515.94/440.17
  6. Step 6: Final answer
    x = 607.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.