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Finding the Fourth Proportional to 312,561.85, 431,335.55 and 169,322.46

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Solution

The fourth proportional to 312,561.85, 431,335.55 and 169,322.46 is: 233,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,561.85 : 431,335.55 = 169,322.46 : x
  2. Step 2: Convert to fraction form
    312,561.85/431,335.55 = 169,322.46/x
  3. Step 3: Cross multiply
    312,561.85x = 431,335.55 × 169,322.46
  4. Step 4: Simplify right side
    312,561.85x = 73,034,793,408.16
  5. Step 5: Solve for x
    x = 73,034,793,408.16/312,561.85
  6. Step 6: Final answer
    x = 233,665.10

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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.