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Finding the Fourth Proportional to 312,431.08, 431,151.46 and 169,187.56

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Solution

The fourth proportional to 312,431.08, 431,151.46 and 169,187.56 is: 233,476.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,431.08 : 431,151.46 = 169,187.56 : x
  2. Step 2: Convert to fraction form
    312,431.08/431,151.46 = 169,187.56/x
  3. Step 3: Cross multiply
    312,431.08x = 431,151.46 × 169,187.56
  4. Step 4: Simplify right side
    312,431.08x = 72,945,463,507.84
  5. Step 5: Solve for x
    x = 72,945,463,507.84/312,431.08
  6. Step 6: Final answer
    x = 233,476.98

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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.