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Finding the Fourth Proportional to 649.82, 974.64 and 216.92

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Solution

The fourth proportional to 649.82, 974.64 and 216.92 is: 325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.82 : 974.64 = 216.92 : x
  2. Step 2: Convert to fraction form
    649.82/974.64 = 216.92/x
  3. Step 3: Cross multiply
    649.82x = 974.64 × 216.92
  4. Step 4: Simplify right side
    649.82x = 211,418.91
  5. Step 5: Solve for x
    x = 211,418.91/649.82
  6. Step 6: Final answer
    x = 325.35

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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.