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Finding the Fourth Proportional to 842.04, 1,262.34 and 660.24

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Solution

The fourth proportional to 842.04, 1,262.34 and 660.24 is: 989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.04 : 1,262.34 = 660.24 : x
  2. Step 2: Convert to fraction form
    842.04/1,262.34 = 660.24/x
  3. Step 3: Cross multiply
    842.04x = 1,262.34 × 660.24
  4. Step 4: Simplify right side
    842.04x = 833,447.36
  5. Step 5: Solve for x
    x = 833,447.36/842.04
  6. Step 6: Final answer
    x = 989.80

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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.