Home / 312,419.27-431,138.81-169,179.42

Finding the Fourth Proportional to 312,419.27, 431,138.81 and 169,179.42

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Solution

The fourth proportional to 312,419.27, 431,138.81 and 169,179.42 is: 233,467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,419.27 : 431,138.81 = 169,179.42 : x
  2. Step 2: Convert to fraction form
    312,419.27/431,138.81 = 169,179.42/x
  3. Step 3: Cross multiply
    312,419.27x = 431,138.81 × 169,179.42
  4. Step 4: Simplify right side
    312,419.27x = 72,939,813,815.29
  5. Step 5: Solve for x
    x = 72,939,813,815.29/312,419.27
  6. Step 6: Final answer
    x = 233,467.72

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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.