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Finding the Fourth Proportional to 284.77, 427.19 and 89.76

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Solution

The fourth proportional to 284.77, 427.19 and 89.76 is: 134.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.77 : 427.19 = 89.76 : x
  2. Step 2: Convert to fraction form
    284.77/427.19 = 89.76/x
  3. Step 3: Cross multiply
    284.77x = 427.19 × 89.76
  4. Step 4: Simplify right side
    284.77x = 38,344.57
  5. Step 5: Solve for x
    x = 38,344.57/284.77
  6. Step 6: Final answer
    x = 134.65

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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.