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Finding the Fourth Proportional to 284.63, 426.95 and 89.65

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Solution

The fourth proportional to 284.63, 426.95 and 89.65 is: 134.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.63 : 426.95 = 89.65 : x
  2. Step 2: Convert to fraction form
    284.63/426.95 = 89.65/x
  3. Step 3: Cross multiply
    284.63x = 426.95 × 89.65
  4. Step 4: Simplify right side
    284.63x = 38,273.48
  5. Step 5: Solve for x
    x = 38,273.48/284.63
  6. Step 6: Final answer
    x = 134.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.