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Finding the Fourth Proportional to 775.71, 1,156.62 and 766.11

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Solution

The fourth proportional to 775.71, 1,156.62 and 766.11 is: 1,142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.71 : 1,156.62 = 766.11 : x
  2. Step 2: Convert to fraction form
    775.71/1,156.62 = 766.11/x
  3. Step 3: Cross multiply
    775.71x = 1,156.62 × 766.11
  4. Step 4: Simplify right side
    775.71x = 886,098.15
  5. Step 5: Solve for x
    x = 886,098.15/775.71
  6. Step 6: Final answer
    x = 1,142.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.