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Finding the Fourth Proportional to 890.19, 1,330.22 and 659.54

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Solution

The fourth proportional to 890.19, 1,330.22 and 659.54 is: 985.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.19 : 1,330.22 = 659.54 : x
  2. Step 2: Convert to fraction form
    890.19/1,330.22 = 659.54/x
  3. Step 3: Cross multiply
    890.19x = 1,330.22 × 659.54
  4. Step 4: Simplify right side
    890.19x = 877,338.27
  5. Step 5: Solve for x
    x = 877,338.27/890.19
  6. Step 6: Final answer
    x = 985.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.