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Finding the Fourth Proportional to 228.21, 314.93 and 124.71

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Solution

The fourth proportional to 228.21, 314.93 and 124.71 is: 172.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.21 : 314.93 = 124.71 : x
  2. Step 2: Convert to fraction form
    228.21/314.93 = 124.71/x
  3. Step 3: Cross multiply
    228.21x = 314.93 × 124.71
  4. Step 4: Simplify right side
    228.21x = 39,274.30
  5. Step 5: Solve for x
    x = 39,274.30/228.21
  6. Step 6: Final answer
    x = 172.10

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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.