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Finding the Fourth Proportional to 284.56, 392.72 and 197.28

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Solution

The fourth proportional to 284.56, 392.72 and 197.28 is: 272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.56 : 392.72 = 197.28 : x
  2. Step 2: Convert to fraction form
    284.56/392.72 = 197.28/x
  3. Step 3: Cross multiply
    284.56x = 392.72 × 197.28
  4. Step 4: Simplify right side
    284.56x = 77,475.80
  5. Step 5: Solve for x
    x = 77,475.80/284.56
  6. Step 6: Final answer
    x = 272.27

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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.