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Finding the Fourth Proportional to 385.57, 577.80 and 248.53

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Solution

The fourth proportional to 385.57, 577.80 and 248.53 is: 372.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.57 : 577.80 = 248.53 : x
  2. Step 2: Convert to fraction form
    385.57/577.80 = 248.53/x
  3. Step 3: Cross multiply
    385.57x = 577.80 × 248.53
  4. Step 4: Simplify right side
    385.57x = 143,600.63
  5. Step 5: Solve for x
    x = 143,600.63/385.57
  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.