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Finding the Fourth Proportional to 880.52, 1,319.45 and 660.08

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Solution

The fourth proportional to 880.52, 1,319.45 and 660.08 is: 989.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.52 : 1,319.45 = 660.08 : x
  2. Step 2: Convert to fraction form
    880.52/1,319.45 = 660.08/x
  3. Step 3: Cross multiply
    880.52x = 1,319.45 × 660.08
  4. Step 4: Simplify right side
    880.52x = 870,939.26
  5. Step 5: Solve for x
    x = 870,939.26/880.52
  6. Step 6: Final answer
    x = 989.12

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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.