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Finding the Fourth Proportional to 284.58, 392.49 and 205.74

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Solution

The fourth proportional to 284.58, 392.49 and 205.74 is: 283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.58 : 392.49 = 205.74 : x
  2. Step 2: Convert to fraction form
    284.58/392.49 = 205.74/x
  3. Step 3: Cross multiply
    284.58x = 392.49 × 205.74
  4. Step 4: Simplify right side
    284.58x = 80,750.89
  5. Step 5: Solve for x
    x = 80,750.89/284.58
  6. Step 6: Final answer
    x = 283.75

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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.