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Finding the Fourth Proportional to 552.39, 762.30 and 319.50

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Solution

The fourth proportional to 552.39, 762.30 and 319.50 is: 440.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.39 : 762.30 = 319.50 : x
  2. Step 2: Convert to fraction form
    552.39/762.30 = 319.50/x
  3. Step 3: Cross multiply
    552.39x = 762.30 × 319.50
  4. Step 4: Simplify right side
    552.39x = 243,554.85
  5. Step 5: Solve for x
    x = 243,554.85/552.39
  6. Step 6: Final answer
    x = 440.91

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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.