Home / 1,391,641.85-2,087,517.98-661,989.85

Finding the Fourth Proportional to 1,391,641.85, 2,087,517.98 and 661,989.85

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Solution

The fourth proportional to 1,391,641.85, 2,087,517.98 and 661,989.85 is: 993,011.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,641.85 : 2,087,517.98 = 661,989.85 : x
  2. Step 2: Convert to fraction form
    1,391,641.85/2,087,517.98 = 661,989.85/x
  3. Step 3: Cross multiply
    1,391,641.85x = 2,087,517.98 × 661,989.85
  4. Step 4: Simplify right side
    1,391,641.85x = 1,381,915,700,704.96
  5. Step 5: Solve for x
    x = 1,381,915,700,704.96/1,391,641.85
  6. Step 6: Final answer
    x = 993,011.03

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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.