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Finding the Fourth Proportional to 652.98, 979.38 and 220.08

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Solution

The fourth proportional to 652.98, 979.38 and 220.08 is: 330.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.98 : 979.38 = 220.08 : x
  2. Step 2: Convert to fraction form
    652.98/979.38 = 220.08/x
  3. Step 3: Cross multiply
    652.98x = 979.38 × 220.08
  4. Step 4: Simplify right side
    652.98x = 215,541.95
  5. Step 5: Solve for x
    x = 215,541.95/652.98
  6. Step 6: Final answer
    x = 330.09

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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.