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Finding the Fourth Proportional to 425.32, 634.49 and 357.28

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Solution

The fourth proportional to 425.32, 634.49 and 357.28 is: 532.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.32 : 634.49 = 357.28 : x
  2. Step 2: Convert to fraction form
    425.32/634.49 = 357.28/x
  3. Step 3: Cross multiply
    425.32x = 634.49 × 357.28
  4. Step 4: Simplify right side
    425.32x = 226,690.59
  5. Step 5: Solve for x
    x = 226,690.59/425.32
  6. Step 6: Final answer
    x = 532.99

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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.