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Finding the Fourth Proportional to 284.32, 392.78 and 191.03

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Solution

The fourth proportional to 284.32, 392.78 and 191.03 is: 263.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.32 : 392.78 = 191.03 : x
  2. Step 2: Convert to fraction form
    284.32/392.78 = 191.03/x
  3. Step 3: Cross multiply
    284.32x = 392.78 × 191.03
  4. Step 4: Simplify right side
    284.32x = 75,031.81
  5. Step 5: Solve for x
    x = 75,031.81/284.32
  6. Step 6: Final answer
    x = 263.90

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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.