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Finding the Fourth Proportional to 549.74, 758.95 and 422.69

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Solution

The fourth proportional to 549.74, 758.95 and 422.69 is: 583.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.74 : 758.95 = 422.69 : x
  2. Step 2: Convert to fraction form
    549.74/758.95 = 422.69/x
  3. Step 3: Cross multiply
    549.74x = 758.95 × 422.69
  4. Step 4: Simplify right side
    549.74x = 320,795.72
  5. Step 5: Solve for x
    x = 320,795.72/549.74
  6. Step 6: Final answer
    x = 583.54

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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.