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Finding the Fourth Proportional to 312,507.67, 431,260.61 and 169,267.75

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Solution

The fourth proportional to 312,507.67, 431,260.61 and 169,267.75 is: 233,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,507.67 : 431,260.61 = 169,267.75 : x
  2. Step 2: Convert to fraction form
    312,507.67/431,260.61 = 169,267.75/x
  3. Step 3: Cross multiply
    312,507.67x = 431,260.61 × 169,267.75
  4. Step 4: Simplify right side
    312,507.67x = 72,998,512,406.76
  5. Step 5: Solve for x
    x = 72,998,512,406.76/312,507.67
  6. Step 6: Final answer
    x = 233,589.51

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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.