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Finding the Fourth Proportional to 284.40, 392.41 and 186.09

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Solution

The fourth proportional to 284.40, 392.41 and 186.09 is: 256.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.40 : 392.41 = 186.09 : x
  2. Step 2: Convert to fraction form
    284.40/392.41 = 186.09/x
  3. Step 3: Cross multiply
    284.40x = 392.41 × 186.09
  4. Step 4: Simplify right side
    284.40x = 73,023.58
  5. Step 5: Solve for x
    x = 73,023.58/284.40
  6. Step 6: Final answer
    x = 256.76

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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.