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Finding the Fourth Proportional to 471.20, 648.08 and 448.16

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Solution

The fourth proportional to 471.20, 648.08 and 448.16 is: 616.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.20 : 648.08 = 448.16 : x
  2. Step 2: Convert to fraction form
    471.20/648.08 = 448.16/x
  3. Step 3: Cross multiply
    471.20x = 648.08 × 448.16
  4. Step 4: Simplify right side
    471.20x = 290,443.53
  5. Step 5: Solve for x
    x = 290,443.53/471.20
  6. Step 6: Final answer
    x = 616.39

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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.