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Finding the Fourth Proportional to 284.64, 427.05 and 130.68

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Solution

The fourth proportional to 284.64, 427.05 and 130.68 is: 196.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.64 : 427.05 = 130.68 : x
  2. Step 2: Convert to fraction form
    284.64/427.05 = 130.68/x
  3. Step 3: Cross multiply
    284.64x = 427.05 × 130.68
  4. Step 4: Simplify right side
    284.64x = 55,806.89
  5. Step 5: Solve for x
    x = 55,806.89/284.64
  6. Step 6: Final answer
    x = 196.06

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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.