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Finding the Fourth Proportional to 312,559.35, 431,330.85 and 169,319.22

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Solution

The fourth proportional to 312,559.35, 431,330.85 and 169,319.22 is: 233,659.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,559.35 : 431,330.85 = 169,319.22 : x
  2. Step 2: Convert to fraction form
    312,559.35/431,330.85 = 169,319.22/x
  3. Step 3: Cross multiply
    312,559.35x = 431,330.85 × 169,319.22
  4. Step 4: Simplify right side
    312,559.35x = 73,032,603,083.94
  5. Step 5: Solve for x
    x = 73,032,603,083.94/312,559.35
  6. Step 6: Final answer
    x = 233,659.95

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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.