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Finding the Fourth Proportional to 425.90, 634.20 and 424.10

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Solution

The fourth proportional to 425.90, 634.20 and 424.10 is: 631.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.90 : 634.20 = 424.10 : x
  2. Step 2: Convert to fraction form
    425.90/634.20 = 424.10/x
  3. Step 3: Cross multiply
    425.90x = 634.20 × 424.10
  4. Step 4: Simplify right side
    425.90x = 268,964.22
  5. Step 5: Solve for x
    x = 268,964.22/425.90
  6. Step 6: Final answer
    x = 631.52

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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.