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Finding the Fourth Proportional to 312,745.42, 431,588.42 and 169,505.42

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Solution

The fourth proportional to 312,745.42, 431,588.42 and 169,505.42 is: 233,917.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,745.42 : 431,588.42 = 169,505.42 : x
  2. Step 2: Convert to fraction form
    312,745.42/431,588.42 = 169,505.42/x
  3. Step 3: Cross multiply
    312,745.42x = 431,588.42 × 169,505.42
  4. Step 4: Simplify right side
    312,745.42x = 73,156,576,399.24
  5. Step 5: Solve for x
    x = 73,156,576,399.24/312,745.42
  6. Step 6: Final answer
    x = 233,917.34

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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.