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Finding the Fourth Proportional to 549.16, 822.48 and 432.79

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Solution

The fourth proportional to 549.16, 822.48 and 432.79 is: 648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.16 : 822.48 = 432.79 : x
  2. Step 2: Convert to fraction form
    549.16/822.48 = 432.79/x
  3. Step 3: Cross multiply
    549.16x = 822.48 × 432.79
  4. Step 4: Simplify right side
    549.16x = 355,961.12
  5. Step 5: Solve for x
    x = 355,961.12/549.16
  6. Step 6: Final answer
    x = 648.19

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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.