Home / 641,549.20-885,310.66-355,042.48

Finding the Fourth Proportional to 641,549.20, 885,310.66 and 355,042.48

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Solution

The fourth proportional to 641,549.20, 885,310.66 and 355,042.48 is: 489,943.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,549.20 : 885,310.66 = 355,042.48 : x
  2. Step 2: Convert to fraction form
    641,549.20/885,310.66 = 355,042.48/x
  3. Step 3: Cross multiply
    641,549.20x = 885,310.66 × 355,042.48
  4. Step 4: Simplify right side
    641,549.20x = 314,322,892,296.84
  5. Step 5: Solve for x
    x = 314,322,892,296.84/641,549.20
  6. Step 6: Final answer
    x = 489,943.55

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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.