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Finding the Fourth Proportional to 284.63, 392.88 and 191.31

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Solution

The fourth proportional to 284.63, 392.88 and 191.31 is: 264.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.63 : 392.88 = 191.31 : x
  2. Step 2: Convert to fraction form
    284.63/392.88 = 191.31/x
  3. Step 3: Cross multiply
    284.63x = 392.88 × 191.31
  4. Step 4: Simplify right side
    284.63x = 75,161.87
  5. Step 5: Solve for x
    x = 75,161.87/284.63
  6. Step 6: Final answer
    x = 264.07

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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.