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Finding the Fourth Proportional to 649.28, 973.95 and 216.43

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Solution

The fourth proportional to 649.28, 973.95 and 216.43 is: 324.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.28 : 973.95 = 216.43 : x
  2. Step 2: Convert to fraction form
    649.28/973.95 = 216.43/x
  3. Step 3: Cross multiply
    649.28x = 973.95 × 216.43
  4. Step 4: Simplify right side
    649.28x = 210,792.00
  5. Step 5: Solve for x
    x = 210,792.00/649.28
  6. Step 6: Final answer
    x = 324.66

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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.