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Finding the Fourth Proportional to 549.49, 758.38 and 339.66

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Solution

The fourth proportional to 549.49, 758.38 and 339.66 is: 468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.49 : 758.38 = 339.66 : x
  2. Step 2: Convert to fraction form
    549.49/758.38 = 339.66/x
  3. Step 3: Cross multiply
    549.49x = 758.38 × 339.66
  4. Step 4: Simplify right side
    549.49x = 257,587.22
  5. Step 5: Solve for x
    x = 257,587.22/549.49
  6. Step 6: Final answer
    x = 468.77

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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.