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Finding the Fourth Proportional to 578.36, 867.50 and 253.96

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Solution

The fourth proportional to 578.36, 867.50 and 253.96 is: 380.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.36 : 867.50 = 253.96 : x
  2. Step 2: Convert to fraction form
    578.36/867.50 = 253.96/x
  3. Step 3: Cross multiply
    578.36x = 867.50 × 253.96
  4. Step 4: Simplify right side
    578.36x = 220,310.30
  5. Step 5: Solve for x
    x = 220,310.30/578.36
  6. Step 6: Final answer
    x = 380.92

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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.