Home / 1,286,721.80-1,930,550.70-445,358.60

Finding the Fourth Proportional to 1,286,721.80, 1,930,550.70 and 445,358.60

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Solution

The fourth proportional to 1,286,721.80, 1,930,550.70 and 445,358.60 is: 668,199.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,721.80 : 1,930,550.70 = 445,358.60 : x
  2. Step 2: Convert to fraction form
    1,286,721.80/1,930,550.70 = 445,358.60/x
  3. Step 3: Cross multiply
    1,286,721.80x = 1,930,550.70 × 445,358.60
  4. Step 4: Simplify right side
    1,286,721.80x = 859,787,356,981.02
  5. Step 5: Solve for x
    x = 859,787,356,981.02/1,286,721.80
  6. Step 6: Final answer
    x = 668,199.88

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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.