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Finding the Fourth Proportional to 552.06, 761.94 and 319.20

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Solution

The fourth proportional to 552.06, 761.94 and 319.20 is: 440.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.06 : 761.94 = 319.20 : x
  2. Step 2: Convert to fraction form
    552.06/761.94 = 319.20/x
  3. Step 3: Cross multiply
    552.06x = 761.94 × 319.20
  4. Step 4: Simplify right side
    552.06x = 243,211.25
  5. Step 5: Solve for x
    x = 243,211.25/552.06
  6. Step 6: Final answer
    x = 440.55

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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.