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Finding the Fourth Proportional to 424.54, 634.23 and 355.34

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Solution

The fourth proportional to 424.54, 634.23 and 355.34 is: 530.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.54 : 634.23 = 355.34 : x
  2. Step 2: Convert to fraction form
    424.54/634.23 = 355.34/x
  3. Step 3: Cross multiply
    424.54x = 634.23 × 355.34
  4. Step 4: Simplify right side
    424.54x = 225,365.31
  5. Step 5: Solve for x
    x = 225,365.31/424.54
  6. Step 6: Final answer
    x = 530.84

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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.