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Finding the Fourth Proportional to 284.05, 425.98 and 91.63

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Solution

The fourth proportional to 284.05, 425.98 and 91.63 is: 137.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.05 : 425.98 = 91.63 : x
  2. Step 2: Convert to fraction form
    284.05/425.98 = 91.63/x
  3. Step 3: Cross multiply
    284.05x = 425.98 × 91.63
  4. Step 4: Simplify right side
    284.05x = 39,029.96
  5. Step 5: Solve for x
    x = 39,029.96/284.05
  6. Step 6: Final answer
    x = 137.41

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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.