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Finding the Fourth Proportional to 394,707.50, 544,709.31 and 215,859.50

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Solution

The fourth proportional to 394,707.50, 544,709.31 and 215,859.50 is: 297,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,707.50 : 544,709.31 = 215,859.50 : x
  2. Step 2: Convert to fraction form
    394,707.50/544,709.31 = 215,859.50/x
  3. Step 3: Cross multiply
    394,707.50x = 544,709.31 × 215,859.50
  4. Step 4: Simplify right side
    394,707.50x = 117,580,679,301.95
  5. Step 5: Solve for x
    x = 117,580,679,301.95/394,707.50
  6. Step 6: Final answer
    x = 297,893.20

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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.