Home / 1,390,806,571.20-2,086,209,856.80-839,808,542.40

Finding the Fourth Proportional to 1,390,806,571.20, 2,086,209,856.80 and 839,808,542.40

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Solution

The fourth proportional to 1,390,806,571.20, 2,086,209,856.80 and 839,808,542.40 is: 1,259,712,813.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,806,571.20 : 2,086,209,856.80 = 839,808,542.40 : x
  2. Step 2: Convert to fraction form
    1,390,806,571.20/2,086,209,856.80 = 839,808,542.40/x
  3. Step 3: Cross multiply
    1,390,806,571.20x = 2,086,209,856.80 × 839,808,542.40
  4. Step 4: Simplify right side
    1,390,806,571.20x = 1,752,016,858,979,720,704
  5. Step 5: Solve for x
    x = 1,752,016,858,979,720,704/1,390,806,571.20
  6. Step 6: Final answer
    x = 1,259,712,813.60

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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.