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Finding the Fourth Proportional to 385.62, 578.06 and 248.70

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Solution

The fourth proportional to 385.62, 578.06 and 248.70 is: 372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.62 : 578.06 = 248.70 : x
  2. Step 2: Convert to fraction form
    385.62/578.06 = 248.70/x
  3. Step 3: Cross multiply
    385.62x = 578.06 × 248.70
  4. Step 4: Simplify right side
    385.62x = 143,763.52
  5. Step 5: Solve for x
    x = 143,763.52/385.62
  6. Step 6: Final answer
    x = 372.81

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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.