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Finding the Fourth Proportional to 312,180.64, 430,809.25 and 168,940.69

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Solution

The fourth proportional to 312,180.64, 430,809.25 and 168,940.69 is: 233,138.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,180.64 : 430,809.25 = 168,940.69 : x
  2. Step 2: Convert to fraction form
    312,180.64/430,809.25 = 168,940.69/x
  3. Step 3: Cross multiply
    312,180.64x = 430,809.25 × 168,940.69
  4. Step 4: Simplify right side
    312,180.64x = 72,781,209,376.98
  5. Step 5: Solve for x
    x = 72,781,209,376.98/312,180.64
  6. Step 6: Final answer
    x = 233,138.13

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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.