Home / 782,128.91-1,078,780.32-717,805.48

Finding the Fourth Proportional to 782,128.91, 1,078,780.32 and 717,805.48

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Solution

The fourth proportional to 782,128.91, 1,078,780.32 and 717,805.48 is: 990,059.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,128.91 : 1,078,780.32 = 717,805.48 : x
  2. Step 2: Convert to fraction form
    782,128.91/1,078,780.32 = 717,805.48/x
  3. Step 3: Cross multiply
    782,128.91x = 1,078,780.32 × 717,805.48
  4. Step 4: Simplify right side
    782,128.91x = 774,354,425,412.15
  5. Step 5: Solve for x
    x = 774,354,425,412.15/782,128.91
  6. Step 6: Final answer
    x = 990,059.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.