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Finding the Fourth Proportional to 228.32, 315.09 and 130.08

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Solution

The fourth proportional to 228.32, 315.09 and 130.08 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.32 : 315.09 = 130.08 : x
  2. Step 2: Convert to fraction form
    228.32/315.09 = 130.08/x
  3. Step 3: Cross multiply
    228.32x = 315.09 × 130.08
  4. Step 4: Simplify right side
    228.32x = 40,986.91
  5. Step 5: Solve for x
    x = 40,986.91/228.32
  6. Step 6: Final answer
    x = 179.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.