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Finding the Fourth Proportional to 653.07, 979.40 and 220.13

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Solution

The fourth proportional to 653.07, 979.40 and 220.13 is: 330.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.07 : 979.40 = 220.13 : x
  2. Step 2: Convert to fraction form
    653.07/979.40 = 220.13/x
  3. Step 3: Cross multiply
    653.07x = 979.40 × 220.13
  4. Step 4: Simplify right side
    653.07x = 215,589.32
  5. Step 5: Solve for x
    x = 215,589.32/653.07
  6. Step 6: Final answer
    x = 330.12

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.