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Finding the Fourth Proportional to 758.84, 1,138.60 and 451.30

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Solution

The fourth proportional to 758.84, 1,138.60 and 451.30 is: 677.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.84 : 1,138.60 = 451.30 : x
  2. Step 2: Convert to fraction form
    758.84/1,138.60 = 451.30/x
  3. Step 3: Cross multiply
    758.84x = 1,138.60 × 451.30
  4. Step 4: Simplify right side
    758.84x = 513,850.18
  5. Step 5: Solve for x
    x = 513,850.18/758.84
  6. Step 6: Final answer
    x = 677.15

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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.