Home / 839,964.90-1,259,947.35-278,999.40

Finding the Fourth Proportional to 839,964.90, 1,259,947.35 and 278,999.40

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Solution

The fourth proportional to 839,964.90, 1,259,947.35 and 278,999.40 is: 418,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,964.90 : 1,259,947.35 = 278,999.40 : x
  2. Step 2: Convert to fraction form
    839,964.90/1,259,947.35 = 278,999.40/x
  3. Step 3: Cross multiply
    839,964.90x = 1,259,947.35 × 278,999.40
  4. Step 4: Simplify right side
    839,964.90x = 351,524,554,681.59
  5. Step 5: Solve for x
    x = 351,524,554,681.59/839,964.90
  6. Step 6: Final answer
    x = 418,499.10

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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.