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Finding the Fourth Proportional to 552.13, 761.90 and 319.27

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Solution

The fourth proportional to 552.13, 761.90 and 319.27 is: 440.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.13 : 761.90 = 319.27 : x
  2. Step 2: Convert to fraction form
    552.13/761.90 = 319.27/x
  3. Step 3: Cross multiply
    552.13x = 761.90 × 319.27
  4. Step 4: Simplify right side
    552.13x = 243,250.22
  5. Step 5: Solve for x
    x = 243,250.22/552.13
  6. Step 6: Final answer
    x = 440.57

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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.