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Finding the Fourth Proportional to 892.76, 1,230.71 and 630.32

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Solution

The fourth proportional to 892.76, 1,230.71 and 630.32 is: 868.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.76 : 1,230.71 = 630.32 : x
  2. Step 2: Convert to fraction form
    892.76/1,230.71 = 630.32/x
  3. Step 3: Cross multiply
    892.76x = 1,230.71 × 630.32
  4. Step 4: Simplify right side
    892.76x = 775,745.78
  5. Step 5: Solve for x
    x = 775,745.78/892.76
  6. Step 6: Final answer
    x = 868.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.