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Finding the Fourth Proportional to 549.41, 758.28 and 339.78

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Solution

The fourth proportional to 549.41, 758.28 and 339.78 is: 468.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.41 : 758.28 = 339.78 : x
  2. Step 2: Convert to fraction form
    549.41/758.28 = 339.78/x
  3. Step 3: Cross multiply
    549.41x = 758.28 × 339.78
  4. Step 4: Simplify right side
    549.41x = 257,652.50
  5. Step 5: Solve for x
    x = 257,652.50/549.41
  6. Step 6: Final answer
    x = 468.97

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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.