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Finding the Fourth Proportional to 428,412.43, 591,209.15 and 237,438.12

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Solution

The fourth proportional to 428,412.43, 591,209.15 and 237,438.12 is: 327,664.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,412.43 : 591,209.15 = 237,438.12 : x
  2. Step 2: Convert to fraction form
    428,412.43/591,209.15 = 237,438.12/x
  3. Step 3: Cross multiply
    428,412.43x = 591,209.15 × 237,438.12
  4. Step 4: Simplify right side
    428,412.43x = 140,375,590,302.95
  5. Step 5: Solve for x
    x = 140,375,590,302.95/428,412.43
  6. Step 6: Final answer
    x = 327,664.61

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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.