Home / 1,391,642.85-2,087,519.48-661,990.85

Finding the Fourth Proportional to 1,391,642.85, 2,087,519.48 and 661,990.85

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Solution

The fourth proportional to 1,391,642.85, 2,087,519.48 and 661,990.85 is: 993,012.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,642.85 : 2,087,519.48 = 661,990.85 : x
  2. Step 2: Convert to fraction form
    1,391,642.85/2,087,519.48 = 661,990.85/x
  3. Step 3: Cross multiply
    1,391,642.85x = 2,087,519.48 × 661,990.85
  4. Step 4: Simplify right side
    1,391,642.85x = 1,381,918,794,956.76
  5. Step 5: Solve for x
    x = 1,381,918,794,956.76/1,391,642.85
  6. Step 6: Final answer
    x = 993,012.54

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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.