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Finding the Fourth Proportional to 532.53, 799.49 and 428.48

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Solution

The fourth proportional to 532.53, 799.49 and 428.48 is: 643.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.53 : 799.49 = 428.48 : x
  2. Step 2: Convert to fraction form
    532.53/799.49 = 428.48/x
  3. Step 3: Cross multiply
    532.53x = 799.49 × 428.48
  4. Step 4: Simplify right side
    532.53x = 342,565.48
  5. Step 5: Solve for x
    x = 342,565.48/532.53
  6. Step 6: Final answer
    x = 643.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.