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Finding the Fourth Proportional to 284.44, 392.56 and 172.48

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Solution

The fourth proportional to 284.44, 392.56 and 172.48 is: 238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.44 : 392.56 = 172.48 : x
  2. Step 2: Convert to fraction form
    284.44/392.56 = 172.48/x
  3. Step 3: Cross multiply
    284.44x = 392.56 × 172.48
  4. Step 4: Simplify right side
    284.44x = 67,708.75
  5. Step 5: Solve for x
    x = 67,708.75/284.44
  6. Step 6: Final answer
    x = 238.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.