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Finding the Fourth Proportional to 549.92, 759.52 and 418.64

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Solution

The fourth proportional to 549.92, 759.52 and 418.64 is: 578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.92 : 759.52 = 418.64 : x
  2. Step 2: Convert to fraction form
    549.92/759.52 = 418.64/x
  3. Step 3: Cross multiply
    549.92x = 759.52 × 418.64
  4. Step 4: Simplify right side
    549.92x = 317,965.45
  5. Step 5: Solve for x
    x = 317,965.45/549.92
  6. Step 6: Final answer
    x = 578.20

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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.