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Finding the Fourth Proportional to 653.06, 979.20 and 306.18

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Solution

The fourth proportional to 653.06, 979.20 and 306.18 is: 459.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.06 : 979.20 = 306.18 : x
  2. Step 2: Convert to fraction form
    653.06/979.20 = 306.18/x
  3. Step 3: Cross multiply
    653.06x = 979.20 × 306.18
  4. Step 4: Simplify right side
    653.06x = 299,811.46
  5. Step 5: Solve for x
    x = 299,811.46/653.06
  6. Step 6: Final answer
    x = 459.09

Related Problems

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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.