Home / 643,928.80-966,022.80-539,471.20

Finding the Fourth Proportional to 643,928.80, 966,022.80 and 539,471.20

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Solution

The fourth proportional to 643,928.80, 966,022.80 and 539,471.20 is: 809,315.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,928.80 : 966,022.80 = 539,471.20 : x
  2. Step 2: Convert to fraction form
    643,928.80/966,022.80 = 539,471.20/x
  3. Step 3: Cross multiply
    643,928.80x = 966,022.80 × 539,471.20
  4. Step 4: Simplify right side
    643,928.80x = 521,141,479,143.36
  5. Step 5: Solve for x
    x = 521,141,479,143.36/643,928.80
  6. Step 6: Final answer
    x = 809,315.38

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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.