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Finding the Fourth Proportional to 378.08, 566.88 and 215.68

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Solution

The fourth proportional to 378.08, 566.88 and 215.68 is: 323.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.08 : 566.88 = 215.68 : x
  2. Step 2: Convert to fraction form
    378.08/566.88 = 215.68/x
  3. Step 3: Cross multiply
    378.08x = 566.88 × 215.68
  4. Step 4: Simplify right side
    378.08x = 122,264.68
  5. Step 5: Solve for x
    x = 122,264.68/378.08
  6. Step 6: Final answer
    x = 323.38

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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.