Home / 2,660,658.40-3,988,363.20-1,311,716.80

Finding the Fourth Proportional to 2,660,658.40, 3,988,363.20 and 1,311,716.80

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Solution

The fourth proportional to 2,660,658.40, 3,988,363.20 and 1,311,716.80 is: 1,966,281.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660,658.40 : 3,988,363.20 = 1,311,716.80 : x
  2. Step 2: Convert to fraction form
    2,660,658.40/3,988,363.20 = 1,311,716.80/x
  3. Step 3: Cross multiply
    2,660,658.40x = 3,988,363.20 × 1,311,716.80
  4. Step 4: Simplify right side
    2,660,658.40x = 5,231,603,013,941.76
  5. Step 5: Solve for x
    x = 5,231,603,013,941.76/2,660,658.40
  6. Step 6: Final answer
    x = 1,966,281.36

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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.