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Finding the Fourth Proportional to 758.84, 1,138.24 and 326.28

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Solution

The fourth proportional to 758.84, 1,138.24 and 326.28 is: 489.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.84 : 1,138.24 = 326.28 : x
  2. Step 2: Convert to fraction form
    758.84/1,138.24 = 326.28/x
  3. Step 3: Cross multiply
    758.84x = 1,138.24 × 326.28
  4. Step 4: Simplify right side
    758.84x = 371,384.95
  5. Step 5: Solve for x
    x = 371,384.95/758.84
  6. Step 6: Final answer
    x = 489.41

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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.