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Finding the Fourth Proportional to 717.62, 1,075.22 and 326.98

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Solution

The fourth proportional to 717.62, 1,075.22 and 326.98 is: 489.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.62 : 1,075.22 = 326.98 : x
  2. Step 2: Convert to fraction form
    717.62/1,075.22 = 326.98/x
  3. Step 3: Cross multiply
    717.62x = 1,075.22 × 326.98
  4. Step 4: Simplify right side
    717.62x = 351,575.44
  5. Step 5: Solve for x
    x = 351,575.44/717.62
  6. Step 6: Final answer
    x = 489.92

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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.