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Finding the Fourth Proportional to 887.10, 1,329.21 and 454.38

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Solution

The fourth proportional to 887.10, 1,329.21 and 454.38 is: 680.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.10 : 1,329.21 = 454.38 : x
  2. Step 2: Convert to fraction form
    887.10/1,329.21 = 454.38/x
  3. Step 3: Cross multiply
    887.10x = 1,329.21 × 454.38
  4. Step 4: Simplify right side
    887.10x = 603,966.44
  5. Step 5: Solve for x
    x = 603,966.44/887.10
  6. Step 6: Final answer
    x = 680.83

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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.