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Finding the Fourth Proportional to 470.22, 649.01 and 448.25

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Solution

The fourth proportional to 470.22, 649.01 and 448.25 is: 618.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.22 : 649.01 = 448.25 : x
  2. Step 2: Convert to fraction form
    470.22/649.01 = 448.25/x
  3. Step 3: Cross multiply
    470.22x = 649.01 × 448.25
  4. Step 4: Simplify right side
    470.22x = 290,914.09
  5. Step 5: Solve for x
    x = 290,914.09/470.22
  6. Step 6: Final answer
    x = 618.68

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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.