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Finding the Fourth Proportional to 888.91, 1,338.53 and 659.43

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Solution

The fourth proportional to 888.91, 1,338.53 and 659.43 is: 992.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.91 : 1,338.53 = 659.43 : x
  2. Step 2: Convert to fraction form
    888.91/1,338.53 = 659.43/x
  3. Step 3: Cross multiply
    888.91x = 1,338.53 × 659.43
  4. Step 4: Simplify right side
    888.91x = 882,663.54
  5. Step 5: Solve for x
    x = 882,663.54/888.91
  6. Step 6: Final answer
    x = 992.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.