Home / 687,940.40-1,029,869.40-511,230.80

Finding the Fourth Proportional to 687,940.40, 1,029,869.40 and 511,230.80

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Solution

The fourth proportional to 687,940.40, 1,029,869.40 and 511,230.80 is: 765,329.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,940.40 : 1,029,869.40 = 511,230.80 : x
  2. Step 2: Convert to fraction form
    687,940.40/1,029,869.40 = 511,230.80/x
  3. Step 3: Cross multiply
    687,940.40x = 1,029,869.40 × 511,230.80
  4. Step 4: Simplify right side
    687,940.40x = 526,500,957,257.52
  5. Step 5: Solve for x
    x = 526,500,957,257.52/687,940.40
  6. Step 6: Final answer
    x = 765,329.32

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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.