Home / 819,109.82-1,229,218.31-286,635.45

Finding the Fourth Proportional to 819,109.82, 1,229,218.31 and 286,635.45

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Solution

The fourth proportional to 819,109.82, 1,229,218.31 and 286,635.45 is: 430,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,109.82 : 1,229,218.31 = 286,635.45 : x
  2. Step 2: Convert to fraction form
    819,109.82/1,229,218.31 = 286,635.45/x
  3. Step 3: Cross multiply
    819,109.82x = 1,229,218.31 × 286,635.45
  4. Step 4: Simplify right side
    819,109.82x = 352,337,542,001.91
  5. Step 5: Solve for x
    x = 352,337,542,001.91/819,109.82
  6. Step 6: Final answer
    x = 430,146.89

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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.