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Finding the Fourth Proportional to 766.75, 1,148.58 and 581.98

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Solution

The fourth proportional to 766.75, 1,148.58 and 581.98 is: 871.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.75 : 1,148.58 = 581.98 : x
  2. Step 2: Convert to fraction form
    766.75/1,148.58 = 581.98/x
  3. Step 3: Cross multiply
    766.75x = 1,148.58 × 581.98
  4. Step 4: Simplify right side
    766.75x = 668,450.59
  5. Step 5: Solve for x
    x = 668,450.59/766.75
  6. Step 6: Final answer
    x = 871.80

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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.