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Finding the Fourth Proportional to 378.07, 566.80 and 215.87

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Solution

The fourth proportional to 378.07, 566.80 and 215.87 is: 323.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.07 : 566.80 = 215.87 : x
  2. Step 2: Convert to fraction form
    378.07/566.80 = 215.87/x
  3. Step 3: Cross multiply
    378.07x = 566.80 × 215.87
  4. Step 4: Simplify right side
    378.07x = 122,351.74
  5. Step 5: Solve for x
    x = 122,351.74/378.07
  6. Step 6: Final answer
    x = 323.62

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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.