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Finding the Fourth Proportional to 543.42, 749.94 and 319.38

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Solution

The fourth proportional to 543.42, 749.94 and 319.38 is: 440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.42 : 749.94 = 319.38 : x
  2. Step 2: Convert to fraction form
    543.42/749.94 = 319.38/x
  3. Step 3: Cross multiply
    543.42x = 749.94 × 319.38
  4. Step 4: Simplify right side
    543.42x = 239,515.84
  5. Step 5: Solve for x
    x = 239,515.84/543.42
  6. Step 6: Final answer
    x = 440.76

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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.