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Finding the Fourth Proportional to 425.34, 634.23 and 424.56

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Solution

The fourth proportional to 425.34, 634.23 and 424.56 is: 633.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.34 : 634.23 = 424.56 : x
  2. Step 2: Convert to fraction form
    425.34/634.23 = 424.56/x
  3. Step 3: Cross multiply
    425.34x = 634.23 × 424.56
  4. Step 4: Simplify right side
    425.34x = 269,268.69
  5. Step 5: Solve for x
    x = 269,268.69/425.34
  6. Step 6: Final answer
    x = 633.07

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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.