Home / 641,966.25-885,902.52-355,480.18

Finding the Fourth Proportional to 641,966.25, 885,902.52 and 355,480.18

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Solution

The fourth proportional to 641,966.25, 885,902.52 and 355,480.18 is: 490,556.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,966.25 : 885,902.52 = 355,480.18 : x
  2. Step 2: Convert to fraction form
    641,966.25/885,902.52 = 355,480.18/x
  3. Step 3: Cross multiply
    641,966.25x = 885,902.52 × 355,480.18
  4. Step 4: Simplify right side
    641,966.25x = 314,920,787,272.05
  5. Step 5: Solve for x
    x = 314,920,787,272.05/641,966.25
  6. Step 6: Final answer
    x = 490,556.61

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Double scale
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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.