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Finding the Fourth Proportional to 284.71, 427.08 and 89.84

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Solution

The fourth proportional to 284.71, 427.08 and 89.84 is: 134.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.71 : 427.08 = 89.84 : x
  2. Step 2: Convert to fraction form
    284.71/427.08 = 89.84/x
  3. Step 3: Cross multiply
    284.71x = 427.08 × 89.84
  4. Step 4: Simplify right side
    284.71x = 38,368.87
  5. Step 5: Solve for x
    x = 38,368.87/284.71
  6. Step 6: Final answer
    x = 134.76

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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.