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Finding the Fourth Proportional to 552.94, 763.60 and 386.92

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Solution

The fourth proportional to 552.94, 763.60 and 386.92 is: 534.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.94 : 763.60 = 386.92 : x
  2. Step 2: Convert to fraction form
    552.94/763.60 = 386.92/x
  3. Step 3: Cross multiply
    552.94x = 763.60 × 386.92
  4. Step 4: Simplify right side
    552.94x = 295,452.11
  5. Step 5: Solve for x
    x = 295,452.11/552.94
  6. Step 6: Final answer
    x = 534.33

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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.