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Finding the Fourth Proportional to 980.65, 1,472.01 and 591.60

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Solution

The fourth proportional to 980.65, 1,472.01 and 591.60 is: 888.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.65 : 1,472.01 = 591.60 : x
  2. Step 2: Convert to fraction form
    980.65/1,472.01 = 591.60/x
  3. Step 3: Cross multiply
    980.65x = 1,472.01 × 591.60
  4. Step 4: Simplify right side
    980.65x = 870,841.12
  5. Step 5: Solve for x
    x = 870,841.12/980.65
  6. Step 6: Final answer
    x = 888.02

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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.