Home / 312,769.09-431,667.47-198,058.21

Finding the Fourth Proportional to 312,769.09, 431,667.47 and 198,058.21

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Solution

The fourth proportional to 312,769.09, 431,667.47 and 198,058.21 is: 273,349.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,769.09 : 431,667.47 = 198,058.21 : x
  2. Step 2: Convert to fraction form
    312,769.09/431,667.47 = 198,058.21/x
  3. Step 3: Cross multiply
    312,769.09x = 431,667.47 × 198,058.21
  4. Step 4: Simplify right side
    312,769.09x = 85,495,286,423.43
  5. Step 5: Solve for x
    x = 85,495,286,423.43/312,769.09
  6. Step 6: Final answer
    x = 273,349.54

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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.