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Finding the Fourth Proportional to 471.23, 649.61 and 330.91

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Solution

The fourth proportional to 471.23, 649.61 and 330.91 is: 456.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.23 : 649.61 = 330.91 : x
  2. Step 2: Convert to fraction form
    471.23/649.61 = 330.91/x
  3. Step 3: Cross multiply
    471.23x = 649.61 × 330.91
  4. Step 4: Simplify right side
    471.23x = 214,959.20
  5. Step 5: Solve for x
    x = 214,959.20/471.23
  6. Step 6: Final answer
    x = 456.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.