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Finding the Fourth Proportional to 887.58, 1,329.32 and 680.58

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Solution

The fourth proportional to 887.58, 1,329.32 and 680.58 is: 1,019.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.58 : 1,329.32 = 680.58 : x
  2. Step 2: Convert to fraction form
    887.58/1,329.32 = 680.58/x
  3. Step 3: Cross multiply
    887.58x = 1,329.32 × 680.58
  4. Step 4: Simplify right side
    887.58x = 904,708.61
  5. Step 5: Solve for x
    x = 904,708.61/887.58
  6. Step 6: Final answer
    x = 1,019.30

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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.