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Finding the Fourth Proportional to 888.62, 1,330.20 and 813.02

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Solution

The fourth proportional to 888.62, 1,330.20 and 813.02 is: 1,217.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.62 : 1,330.20 = 813.02 : x
  2. Step 2: Convert to fraction form
    888.62/1,330.20 = 813.02/x
  3. Step 3: Cross multiply
    888.62x = 1,330.20 × 813.02
  4. Step 4: Simplify right side
    888.62x = 1,081,479.20
  5. Step 5: Solve for x
    x = 1,081,479.20/888.62
  6. Step 6: Final answer
    x = 1,217.03

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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.