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Finding the Fourth Proportional to 284.90, 426.78 and 230.66

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Solution

The fourth proportional to 284.90, 426.78 and 230.66 is: 345.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.90 : 426.78 = 230.66 : x
  2. Step 2: Convert to fraction form
    284.90/426.78 = 230.66/x
  3. Step 3: Cross multiply
    284.90x = 426.78 × 230.66
  4. Step 4: Simplify right side
    284.90x = 98,441.07
  5. Step 5: Solve for x
    x = 98,441.07/284.90
  6. Step 6: Final answer
    x = 345.53

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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.