Home / 1,285,915.73-1,930,029.98-687,388.50

Finding the Fourth Proportional to 1,285,915.73, 1,930,029.98 and 687,388.50

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Solution

The fourth proportional to 1,285,915.73, 1,930,029.98 and 687,388.50 is: 1,031,700.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,915.73 : 1,930,029.98 = 687,388.50 : x
  2. Step 2: Convert to fraction form
    1,285,915.73/1,930,029.98 = 687,388.50/x
  3. Step 3: Cross multiply
    1,285,915.73x = 1,930,029.98 × 687,388.50
  4. Step 4: Simplify right side
    1,285,915.73x = 1,326,680,409,470.29
  5. Step 5: Solve for x
    x = 1,326,680,409,470.29/1,285,915.73
  6. Step 6: Final answer
    x = 1,031,700.90

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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.