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Finding the Fourth Proportional to 887.12, 1,330.80 and 400.12

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Solution

The fourth proportional to 887.12, 1,330.80 and 400.12 is: 600.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.12 : 1,330.80 = 400.12 : x
  2. Step 2: Convert to fraction form
    887.12/1,330.80 = 400.12/x
  3. Step 3: Cross multiply
    887.12x = 1,330.80 × 400.12
  4. Step 4: Simplify right side
    887.12x = 532,479.70
  5. Step 5: Solve for x
    x = 532,479.70/887.12
  6. Step 6: Final answer
    x = 600.23

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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.