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Finding the Fourth Proportional to 378.13, 567.58 and 172.84

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Solution

The fourth proportional to 378.13, 567.58 and 172.84 is: 259.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.13 : 567.58 = 172.84 : x
  2. Step 2: Convert to fraction form
    378.13/567.58 = 172.84/x
  3. Step 3: Cross multiply
    378.13x = 567.58 × 172.84
  4. Step 4: Simplify right side
    378.13x = 98,100.53
  5. Step 5: Solve for x
    x = 98,100.53/378.13
  6. Step 6: Final answer
    x = 259.44

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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.