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Finding the Fourth Proportional to 653.25, 979.70 and 306.38

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Solution

The fourth proportional to 653.25, 979.70 and 306.38 is: 459.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.25 : 979.70 = 306.38 : x
  2. Step 2: Convert to fraction form
    653.25/979.70 = 306.38/x
  3. Step 3: Cross multiply
    653.25x = 979.70 × 306.38
  4. Step 4: Simplify right side
    653.25x = 300,154.06
  5. Step 5: Solve for x
    x = 300,154.06/653.25
  6. Step 6: Final answer
    x = 459.48

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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.