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Finding the Fourth Proportional to 228.25, 314.99 and 124.75

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Solution

The fourth proportional to 228.25, 314.99 and 124.75 is: 172.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.25 : 314.99 = 124.75 : x
  2. Step 2: Convert to fraction form
    228.25/314.99 = 124.75/x
  3. Step 3: Cross multiply
    228.25x = 314.99 × 124.75
  4. Step 4: Simplify right side
    228.25x = 39,294.38
  5. Step 5: Solve for x
    x = 39,294.38/228.25
  6. Step 6: Final answer
    x = 172.16

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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.