Home / 312,429.09-431,152.56-169,189.38

Finding the Fourth Proportional to 312,429.09, 431,152.56 and 169,189.38

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Solution

The fourth proportional to 312,429.09, 431,152.56 and 169,189.38 is: 233,481.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,429.09 : 431,152.56 = 169,189.38 : x
  2. Step 2: Convert to fraction form
    312,429.09/431,152.56 = 169,189.38/x
  3. Step 3: Cross multiply
    312,429.09x = 431,152.56 × 169,189.38
  4. Step 4: Simplify right side
    312,429.09x = 72,946,434,311.81
  5. Step 5: Solve for x
    x = 72,946,434,311.81/312,429.09
  6. Step 6: Final answer
    x = 233,481.57

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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.