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Finding the Fourth Proportional to 386.04, 577.92 and 248.78

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Solution

The fourth proportional to 386.04, 577.92 and 248.78 is: 372.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.04 : 577.92 = 248.78 : x
  2. Step 2: Convert to fraction form
    386.04/577.92 = 248.78/x
  3. Step 3: Cross multiply
    386.04x = 577.92 × 248.78
  4. Step 4: Simplify right side
    386.04x = 143,774.94
  5. Step 5: Solve for x
    x = 143,774.94/386.04
  6. Step 6: Final answer
    x = 372.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.