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Finding the Fourth Proportional to 228,378.28, 315,157.31 and 126,397.65

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Solution

The fourth proportional to 228,378.28, 315,157.31 and 126,397.65 is: 174,426.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,378.28 : 315,157.31 = 126,397.65 : x
  2. Step 2: Convert to fraction form
    228,378.28/315,157.31 = 126,397.65/x
  3. Step 3: Cross multiply
    228,378.28x = 315,157.31 × 126,397.65
  4. Step 4: Simplify right side
    228,378.28x = 39,835,143,680.32
  5. Step 5: Solve for x
    x = 39,835,143,680.32/228,378.28
  6. Step 6: Final answer
    x = 174,426.15

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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.