Home / 819,137.54-1,228,706.70-258,215.78

Finding the Fourth Proportional to 819,137.54, 1,228,706.70 and 258,215.78

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Solution

The fourth proportional to 819,137.54, 1,228,706.70 and 258,215.78 is: 387,323.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,137.54 : 1,228,706.70 = 258,215.78 : x
  2. Step 2: Convert to fraction form
    819,137.54/1,228,706.70 = 258,215.78/x
  3. Step 3: Cross multiply
    819,137.54x = 1,228,706.70 × 258,215.78
  4. Step 4: Simplify right side
    819,137.54x = 317,271,458,931.73
  5. Step 5: Solve for x
    x = 317,271,458,931.73/819,137.54
  6. Step 6: Final answer
    x = 387,323.79

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Similar ratio
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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.