Home / 783,759.76-1,175,972.44-428,358.48

Finding the Fourth Proportional to 783,759.76, 1,175,972.44 and 428,358.48

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Solution

The fourth proportional to 783,759.76, 1,175,972.44 and 428,358.48 is: 642,719.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,759.76 : 1,175,972.44 = 428,358.48 : x
  2. Step 2: Convert to fraction form
    783,759.76/1,175,972.44 = 428,358.48/x
  3. Step 3: Cross multiply
    783,759.76x = 1,175,972.44 × 428,358.48
  4. Step 4: Simplify right side
    783,759.76x = 503,737,766,920.29
  5. Step 5: Solve for x
    x = 503,737,766,920.29/783,759.76
  6. Step 6: Final answer
    x = 642,719.61

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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.