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Finding the Fourth Proportional to 653.97, 981.11 and 325.09

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Solution

The fourth proportional to 653.97, 981.11 and 325.09 is: 487.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.97 : 981.11 = 325.09 : x
  2. Step 2: Convert to fraction form
    653.97/981.11 = 325.09/x
  3. Step 3: Cross multiply
    653.97x = 981.11 × 325.09
  4. Step 4: Simplify right side
    653.97x = 318,948.65
  5. Step 5: Solve for x
    x = 318,948.65/653.97
  6. Step 6: Final answer
    x = 487.71

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.