Home / 641,821.20-885,707.16-369,789.36

Finding the Fourth Proportional to 641,821.20, 885,707.16 and 369,789.36

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Solution

The fourth proportional to 641,821.20, 885,707.16 and 369,789.36 is: 510,305.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,821.20 : 885,707.16 = 369,789.36 : x
  2. Step 2: Convert to fraction form
    641,821.20/885,707.16 = 369,789.36/x
  3. Step 3: Cross multiply
    641,821.20x = 885,707.16 × 369,789.36
  4. Step 4: Simplify right side
    641,821.20x = 327,525,083,843.82
  5. Step 5: Solve for x
    x = 327,525,083,843.82/641,821.20
  6. Step 6: Final answer
    x = 510,305.80

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1.5x scale

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.