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Finding the Fourth Proportional to 228.64, 342.98 and 189.88

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Solution

The fourth proportional to 228.64, 342.98 and 189.88 is: 284.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.64 : 342.98 = 189.88 : x
  2. Step 2: Convert to fraction form
    228.64/342.98 = 189.88/x
  3. Step 3: Cross multiply
    228.64x = 342.98 × 189.88
  4. Step 4: Simplify right side
    228.64x = 65,125.04
  5. Step 5: Solve for x
    x = 65,125.04/228.64
  6. Step 6: Final answer
    x = 284.84

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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.