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Finding the Fourth Proportional to 259,637.70, 389,456.55 and 170,991.30

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Solution

The fourth proportional to 259,637.70, 389,456.55 and 170,991.30 is: 256,486.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.70 : 389,456.55 = 170,991.30 : x
  2. Step 2: Convert to fraction form
    259,637.70/389,456.55 = 170,991.30/x
  3. Step 3: Cross multiply
    259,637.70x = 389,456.55 × 170,991.30
  4. Step 4: Simplify right side
    259,637.70x = 66,593,681,778.02
  5. Step 5: Solve for x
    x = 66,593,681,778.02/259,637.70
  6. Step 6: Final answer
    x = 256,486.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.