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Finding the Fourth Proportional to 312,683.56, 431,503.90 and 169,443.70

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Solution

The fourth proportional to 312,683.56, 431,503.90 and 169,443.70 is: 233,832.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,683.56 : 431,503.90 = 169,443.70 : x
  2. Step 2: Convert to fraction form
    312,683.56/431,503.90 = 169,443.70/x
  3. Step 3: Cross multiply
    312,683.56x = 431,503.90 × 169,443.70
  4. Step 4: Simplify right side
    312,683.56x = 73,115,617,380.43
  5. Step 5: Solve for x
    x = 73,115,617,380.43/312,683.56
  6. Step 6: Final answer
    x = 233,832.62

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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.