Home / 1,391,198.88-1,920,013.80-779,516.84

Finding the Fourth Proportional to 1,391,198.88, 1,920,013.80 and 779,516.84

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Solution

The fourth proportional to 1,391,198.88, 1,920,013.80 and 779,516.84 is: 1,075,822.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,198.88 : 1,920,013.80 = 779,516.84 : x
  2. Step 2: Convert to fraction form
    1,391,198.88/1,920,013.80 = 779,516.84/x
  3. Step 3: Cross multiply
    1,391,198.88x = 1,920,013.80 × 779,516.84
  4. Step 4: Simplify right side
    1,391,198.88x = 1,496,683,090,132.39
  5. Step 5: Solve for x
    x = 1,496,683,090,132.39/1,391,198.88
  6. Step 6: Final answer
    x = 1,075,822.52

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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.