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Finding the Fourth Proportional to 649.43, 973.91 and 324.57

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Solution

The fourth proportional to 649.43, 973.91 and 324.57 is: 486.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.43 : 973.91 = 324.57 : x
  2. Step 2: Convert to fraction form
    649.43/973.91 = 324.57/x
  3. Step 3: Cross multiply
    649.43x = 973.91 × 324.57
  4. Step 4: Simplify right side
    649.43x = 316,100.35
  5. Step 5: Solve for x
    x = 316,100.35/649.43
  6. Step 6: Final answer
    x = 486.74

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Double scale
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Similar ratio
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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.