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Finding the Fourth Proportional to 440.52, 661.70 and 425.17

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Solution

The fourth proportional to 440.52, 661.70 and 425.17 is: 638.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.52 : 661.70 = 425.17 : x
  2. Step 2: Convert to fraction form
    440.52/661.70 = 425.17/x
  3. Step 3: Cross multiply
    440.52x = 661.70 × 425.17
  4. Step 4: Simplify right side
    440.52x = 281,333.16
  5. Step 5: Solve for x
    x = 281,333.16/440.52
  6. Step 6: Final answer
    x = 638.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.