Home / 1,211,449.49-1,671,811.34-667,604.78

Finding the Fourth Proportional to 1,211,449.49, 1,671,811.34 and 667,604.78

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Solution

The fourth proportional to 1,211,449.49, 1,671,811.34 and 667,604.78 is: 921,300.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,449.49 : 1,671,811.34 = 667,604.78 : x
  2. Step 2: Convert to fraction form
    1,211,449.49/1,671,811.34 = 667,604.78/x
  3. Step 3: Cross multiply
    1,211,449.49x = 1,671,811.34 × 667,604.78
  4. Step 4: Simplify right side
    1,211,449.49x = 1,116,109,230,145.12
  5. Step 5: Solve for x
    x = 1,116,109,230,145.12/1,211,449.49
  6. Step 6: Final answer
    x = 921,300.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.