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Finding the Fourth Proportional to 887.68, 1,329.54 and 680.73

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Solution

The fourth proportional to 887.68, 1,329.54 and 680.73 is: 1,019.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.68 : 1,329.54 = 680.73 : x
  2. Step 2: Convert to fraction form
    887.68/1,329.54 = 680.73/x
  3. Step 3: Cross multiply
    887.68x = 1,329.54 × 680.73
  4. Step 4: Simplify right side
    887.68x = 905,057.76
  5. Step 5: Solve for x
    x = 905,057.76/887.68
  6. Step 6: Final answer
    x = 1,019.58

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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.