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Finding the Fourth Proportional to 423.40, 635.25 and 149.53

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Solution

The fourth proportional to 423.40, 635.25 and 149.53 is: 224.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.40 : 635.25 = 149.53 : x
  2. Step 2: Convert to fraction form
    423.40/635.25 = 149.53/x
  3. Step 3: Cross multiply
    423.40x = 635.25 × 149.53
  4. Step 4: Simplify right side
    423.40x = 94,988.93
  5. Step 5: Solve for x
    x = 94,988.93/423.40
  6. Step 6: Final answer
    x = 224.35

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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.