Home / 1,248,379.80-1,869,401.70-686,779.80

Finding the Fourth Proportional to 1,248,379.80, 1,869,401.70 and 686,779.80

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Solution

The fourth proportional to 1,248,379.80, 1,869,401.70 and 686,779.80 is: 1,028,426.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,379.80 : 1,869,401.70 = 686,779.80 : x
  2. Step 2: Convert to fraction form
    1,248,379.80/1,869,401.70 = 686,779.80/x
  3. Step 3: Cross multiply
    1,248,379.80x = 1,869,401.70 × 686,779.80
  4. Step 4: Simplify right side
    1,248,379.80x = 1,283,867,325,645.66
  5. Step 5: Solve for x
    x = 1,283,867,325,645.66/1,248,379.80
  6. Step 6: Final answer
    x = 1,028,426.87

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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.