Home / 3,121,211.80-4,681,947.30-991,235.80

Finding the Fourth Proportional to 3,121,211.80, 4,681,947.30 and 991,235.80

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Solution

The fourth proportional to 3,121,211.80, 4,681,947.30 and 991,235.80 is: 1,486,894.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121,211.80 : 4,681,947.30 = 991,235.80 : x
  2. Step 2: Convert to fraction form
    3,121,211.80/4,681,947.30 = 991,235.80/x
  3. Step 3: Cross multiply
    3,121,211.80x = 4,681,947.30 × 991,235.80
  4. Step 4: Simplify right side
    3,121,211.80x = 4,640,913,777,473.34
  5. Step 5: Solve for x
    x = 4,640,913,777,473.34/3,121,211.80
  6. Step 6: Final answer
    x = 1,486,894.86

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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.