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Finding the Fourth Proportional to 312,539.69, 431,306.85 and 169,299.74

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Solution

The fourth proportional to 312,539.69, 431,306.85 and 169,299.74 is: 233,634.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,539.69 : 431,306.85 = 169,299.74 : x
  2. Step 2: Convert to fraction form
    312,539.69/431,306.85 = 169,299.74/x
  3. Step 3: Cross multiply
    312,539.69x = 431,306.85 × 169,299.74
  4. Step 4: Simplify right side
    312,539.69x = 73,020,135,408.68
  5. Step 5: Solve for x
    x = 73,020,135,408.68/312,539.69
  6. Step 6: Final answer
    x = 233,634.76

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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.