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Finding the Fourth Proportional to 378.99, 568.52 and 135.52

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Solution

The fourth proportional to 378.99, 568.52 and 135.52 is: 203.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.99 : 568.52 = 135.52 : x
  2. Step 2: Convert to fraction form
    378.99/568.52 = 135.52/x
  3. Step 3: Cross multiply
    378.99x = 568.52 × 135.52
  4. Step 4: Simplify right side
    378.99x = 77,045.83
  5. Step 5: Solve for x
    x = 77,045.83/378.99
  6. Step 6: Final answer
    x = 203.29

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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.