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Finding the Fourth Proportional to 385.40, 577.82 and 248.51

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Solution

The fourth proportional to 385.40, 577.82 and 248.51 is: 372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.40 : 577.82 = 248.51 : x
  2. Step 2: Convert to fraction form
    385.40/577.82 = 248.51/x
  3. Step 3: Cross multiply
    385.40x = 577.82 × 248.51
  4. Step 4: Simplify right side
    385.40x = 143,594.05
  5. Step 5: Solve for x
    x = 143,594.05/385.40
  6. Step 6: Final answer
    x = 372.58

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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.