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Finding the Fourth Proportional to 712,288.87, 982,958.45 and 389,998.87

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Solution

The fourth proportional to 712,288.87, 982,958.45 and 389,998.87 is: 538,198.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,288.87 : 982,958.45 = 389,998.87 : x
  2. Step 2: Convert to fraction form
    712,288.87/982,958.45 = 389,998.87/x
  3. Step 3: Cross multiply
    712,288.87x = 982,958.45 × 389,998.87
  4. Step 4: Simplify right side
    712,288.87x = 383,352,680,349.56
  5. Step 5: Solve for x
    x = 383,352,680,349.56/712,288.87
  6. Step 6: Final answer
    x = 538,198.33

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1.5x scale

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.