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Finding the Fourth Proportional to 896.57, 1,338.54 and 766.61

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Solution

The fourth proportional to 896.57, 1,338.54 and 766.61 is: 1,144.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.57 : 1,338.54 = 766.61 : x
  2. Step 2: Convert to fraction form
    896.57/1,338.54 = 766.61/x
  3. Step 3: Cross multiply
    896.57x = 1,338.54 × 766.61
  4. Step 4: Simplify right side
    896.57x = 1,026,134.32
  5. Step 5: Solve for x
    x = 1,026,134.32/896.57
  6. Step 6: Final answer
    x = 1,144.52

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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.