Home / 1,248,390.80-1,869,418.20-686,790.80

Finding the Fourth Proportional to 1,248,390.80, 1,869,418.20 and 686,790.80

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Solution

The fourth proportional to 1,248,390.80, 1,869,418.20 and 686,790.80 is: 1,028,443.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,390.80 : 1,869,418.20 = 686,790.80 : x
  2. Step 2: Convert to fraction form
    1,248,390.80/1,869,418.20 = 686,790.80/x
  3. Step 3: Cross multiply
    1,248,390.80x = 1,869,418.20 × 686,790.80
  4. Step 4: Simplify right side
    1,248,390.80x = 1,283,899,221,112.56
  5. Step 5: Solve for x
    x = 1,283,899,221,112.56/1,248,390.80
  6. Step 6: Final answer
    x = 1,028,443.35

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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.