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Finding the Fourth Proportional to 758.77, 1,136.98 and 450

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Solution

The fourth proportional to 758.77, 1,136.98 and 450 is: 674.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.77 : 1,136.98 = 450 : x
  2. Step 2: Convert to fraction form
    758.77/1,136.98 = 450/x
  3. Step 3: Cross multiply
    758.77x = 1,136.98 × 450
  4. Step 4: Simplify right side
    758.77x = 511,639.88
  5. Step 5: Solve for x
    x = 511,639.88/758.77
  6. Step 6: Final answer
    x = 674.30

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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.