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Finding the Fourth Proportional to 228.96, 314.08 and 225.20

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Solution

The fourth proportional to 228.96, 314.08 and 225.20 is: 308.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.96 : 314.08 = 225.20 : x
  2. Step 2: Convert to fraction form
    228.96/314.08 = 225.20/x
  3. Step 3: Cross multiply
    228.96x = 314.08 × 225.20
  4. Step 4: Simplify right side
    228.96x = 70,730.82
  5. Step 5: Solve for x
    x = 70,730.82/228.96
  6. Step 6: Final answer
    x = 308.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.