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Finding the Fourth Proportional to 759.85, 1,138.66 and 527.78

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Solution

The fourth proportional to 759.85, 1,138.66 and 527.78 is: 790.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.85 : 1,138.66 = 527.78 : x
  2. Step 2: Convert to fraction form
    759.85/1,138.66 = 527.78/x
  3. Step 3: Cross multiply
    759.85x = 1,138.66 × 527.78
  4. Step 4: Simplify right side
    759.85x = 600,963.50
  5. Step 5: Solve for x
    x = 600,963.50/759.85
  6. Step 6: Final answer
    x = 790.90

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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.