Home / 778,221-1,073,961.38-438,689.25

Finding the Fourth Proportional to 778,221, 1,073,961.38 and 438,689.25

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Solution

The fourth proportional to 778,221, 1,073,961.38 and 438,689.25 is: 605,400.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,221 : 1,073,961.38 = 438,689.25 : x
  2. Step 2: Convert to fraction form
    778,221/1,073,961.38 = 438,689.25/x
  3. Step 3: Cross multiply
    778,221x = 1,073,961.38 × 438,689.25
  4. Step 4: Simplify right side
    778,221x = 471,135,313,417.89
  5. Step 5: Solve for x
    x = 471,135,313,417.89/778,221
  6. Step 6: Final answer
    x = 605,400.41

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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.