Home / 1,221,847,681.20-1,686,205,324.80-720,077,642.16

Finding the Fourth Proportional to 1,221,847,681.20, 1,686,205,324.80 and 720,077,642.16

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Solution

The fourth proportional to 1,221,847,681.20, 1,686,205,324.80 and 720,077,642.16 is: 993,739,868.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,847,681.20 : 1,686,205,324.80 = 720,077,642.16 : x
  2. Step 2: Convert to fraction form
    1,221,847,681.20/1,686,205,324.80 = 720,077,642.16/x
  3. Step 3: Cross multiply
    1,221,847,681.20x = 1,686,205,324.80 × 720,077,642.16
  4. Step 4: Simplify right side
    1,221,847,681.20x = 1,214,198,754,479,620,864
  5. Step 5: Solve for x
    x = 1,214,198,754,479,620,864/1,221,847,681.20
  6. Step 6: Final answer
    x = 993,739,868.86

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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.