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Finding the Fourth Proportional to 378.45, 567.78 and 134.99

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Solution

The fourth proportional to 378.45, 567.78 and 134.99 is: 202.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.45 : 567.78 = 134.99 : x
  2. Step 2: Convert to fraction form
    378.45/567.78 = 134.99/x
  3. Step 3: Cross multiply
    378.45x = 567.78 × 134.99
  4. Step 4: Simplify right side
    378.45x = 76,641.11
  5. Step 5: Solve for x
    x = 76,641.11/378.45
  6. Step 6: Final answer
    x = 202.52

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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.