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Finding the Fourth Proportional to 287,138.70, 396,247.95 and 167,906.70

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Solution

The fourth proportional to 287,138.70, 396,247.95 and 167,906.70 is: 231,709.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,138.70 : 396,247.95 = 167,906.70 : x
  2. Step 2: Convert to fraction form
    287,138.70/396,247.95 = 167,906.70/x
  3. Step 3: Cross multiply
    287,138.70x = 396,247.95 × 167,906.70
  4. Step 4: Simplify right side
    287,138.70x = 66,532,685,666.27
  5. Step 5: Solve for x
    x = 66,532,685,666.27/287,138.70
  6. Step 6: Final answer
    x = 231,709.23

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1.5x scale

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.