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Finding the Fourth Proportional to 758.84, 1,138.61 and 746.55

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Solution

The fourth proportional to 758.84, 1,138.61 and 746.55 is: 1,120.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.84 : 1,138.61 = 746.55 : x
  2. Step 2: Convert to fraction form
    758.84/1,138.61 = 746.55/x
  3. Step 3: Cross multiply
    758.84x = 1,138.61 × 746.55
  4. Step 4: Simplify right side
    758.84x = 850,026.96
  5. Step 5: Solve for x
    x = 850,026.96/758.84
  6. Step 6: Final answer
    x = 1,120.17

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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.