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Finding the Fourth Proportional to 311,865.72, 430,374.60 and 168,625.80

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Solution

The fourth proportional to 311,865.72, 430,374.60 and 168,625.80 is: 232,703.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,865.72 : 430,374.60 = 168,625.80 : x
  2. Step 2: Convert to fraction form
    311,865.72/430,374.60 = 168,625.80/x
  3. Step 3: Cross multiply
    311,865.72x = 430,374.60 × 168,625.80
  4. Step 4: Simplify right side
    311,865.72x = 72,572,261,224.68
  5. Step 5: Solve for x
    x = 72,572,261,224.68/311,865.72
  6. Step 6: Final answer
    x = 232,703.55

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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.