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Finding the Fourth Proportional to 470.34, 649.15 and 449.58

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Solution

The fourth proportional to 470.34, 649.15 and 449.58 is: 620.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.34 : 649.15 = 449.58 : x
  2. Step 2: Convert to fraction form
    470.34/649.15 = 449.58/x
  3. Step 3: Cross multiply
    470.34x = 649.15 × 449.58
  4. Step 4: Simplify right side
    470.34x = 291,845.42
  5. Step 5: Solve for x
    x = 291,845.42/470.34
  6. Step 6: Final answer
    x = 620.49

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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.