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Finding the Fourth Proportional to 423.52, 630.08 and 422.08

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Solution

The fourth proportional to 423.52, 630.08 and 422.08 is: 627.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.52 : 630.08 = 422.08 : x
  2. Step 2: Convert to fraction form
    423.52/630.08 = 422.08/x
  3. Step 3: Cross multiply
    423.52x = 630.08 × 422.08
  4. Step 4: Simplify right side
    423.52x = 265,944.17
  5. Step 5: Solve for x
    x = 265,944.17/423.52
  6. Step 6: Final answer
    x = 627.94

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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.