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Finding the Fourth Proportional to 653.54, 979.99 and 324.50

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Solution

The fourth proportional to 653.54, 979.99 and 324.50 is: 486.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.54 : 979.99 = 324.50 : x
  2. Step 2: Convert to fraction form
    653.54/979.99 = 324.50/x
  3. Step 3: Cross multiply
    653.54x = 979.99 × 324.50
  4. Step 4: Simplify right side
    653.54x = 318,001.04
  5. Step 5: Solve for x
    x = 318,001.04/653.54
  6. Step 6: Final answer
    x = 486.59

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.