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Finding the Fourth Proportional to 378.32, 567.19 and 147.18

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Solution

The fourth proportional to 378.32, 567.19 and 147.18 is: 220.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.32 : 567.19 = 147.18 : x
  2. Step 2: Convert to fraction form
    378.32/567.19 = 147.18/x
  3. Step 3: Cross multiply
    378.32x = 567.19 × 147.18
  4. Step 4: Simplify right side
    378.32x = 83,479.02
  5. Step 5: Solve for x
    x = 83,479.02/378.32
  6. Step 6: Final answer
    x = 220.66

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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.