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Finding the Fourth Proportional to 312,180.56, 430,810.25 and 168,940.57

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Solution

The fourth proportional to 312,180.56, 430,810.25 and 168,940.57 is: 233,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,180.56 : 430,810.25 = 168,940.57 : x
  2. Step 2: Convert to fraction form
    312,180.56/430,810.25 = 168,940.57/x
  3. Step 3: Cross multiply
    312,180.56x = 430,810.25 × 168,940.57
  4. Step 4: Simplify right side
    312,180.56x = 72,781,329,196.84
  5. Step 5: Solve for x
    x = 72,781,329,196.84/312,180.56
  6. Step 6: Final answer
    x = 233,138.57

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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.