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Finding the Fourth Proportional to 652.79, 979.28 and 220.07

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Solution

The fourth proportional to 652.79, 979.28 and 220.07 is: 330.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.79 : 979.28 = 220.07 : x
  2. Step 2: Convert to fraction form
    652.79/979.28 = 220.07/x
  3. Step 3: Cross multiply
    652.79x = 979.28 × 220.07
  4. Step 4: Simplify right side
    652.79x = 215,510.15
  5. Step 5: Solve for x
    x = 215,510.15/652.79
  6. Step 6: Final answer
    x = 330.14

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Double scale
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1.5x scale

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.