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Finding the Fourth Proportional to 611,041.93, 843,212.87 and 339,121.15

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Solution

The fourth proportional to 611,041.93, 843,212.87 and 339,121.15 is: 467,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,041.93 : 843,212.87 = 339,121.15 : x
  2. Step 2: Convert to fraction form
    611,041.93/843,212.87 = 339,121.15/x
  3. Step 3: Cross multiply
    611,041.93x = 843,212.87 × 339,121.15
  4. Step 4: Simplify right side
    611,041.93x = 285,951,315,637.27
  5. Step 5: Solve for x
    x = 285,951,315,637.27/611,041.93
  6. Step 6: Final answer
    x = 467,973.31

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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.