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Finding the Fourth Proportional to 888.56, 1,332.04 and 815.68

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Solution

The fourth proportional to 888.56, 1,332.04 and 815.68 is: 1,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.56 : 1,332.04 = 815.68 : x
  2. Step 2: Convert to fraction form
    888.56/1,332.04 = 815.68/x
  3. Step 3: Cross multiply
    888.56x = 1,332.04 × 815.68
  4. Step 4: Simplify right side
    888.56x = 1,086,518.39
  5. Step 5: Solve for x
    x = 1,086,518.39/888.56
  6. Step 6: Final answer
    x = 1,222.79

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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.