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Finding the Fourth Proportional to 552.40, 762.28 and 319.52

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Solution

The fourth proportional to 552.40, 762.28 and 319.52 is: 440.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.40 : 762.28 = 319.52 : x
  2. Step 2: Convert to fraction form
    552.40/762.28 = 319.52/x
  3. Step 3: Cross multiply
    552.40x = 762.28 × 319.52
  4. Step 4: Simplify right side
    552.40x = 243,563.71
  5. Step 5: Solve for x
    x = 243,563.71/552.40
  6. Step 6: Final answer
    x = 440.92

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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.