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Finding the Fourth Proportional to 812,279, 1,120,789.42 and 525,759.32

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Solution

The fourth proportional to 812,279, 1,120,789.42 and 525,759.32 is: 725,447.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,279 : 1,120,789.42 = 525,759.32 : x
  2. Step 2: Convert to fraction form
    812,279/1,120,789.42 = 525,759.32/x
  3. Step 3: Cross multiply
    812,279x = 1,120,789.42 × 525,759.32
  4. Step 4: Simplify right side
    812,279x = 589,265,483,322.39
  5. Step 5: Solve for x
    x = 589,265,483,322.39/812,279
  6. Step 6: Final answer
    x = 725,447.15

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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.