Home / 641,721.57-885,582.77-355,246.44

Finding the Fourth Proportional to 641,721.57, 885,582.77 and 355,246.44

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Solution

The fourth proportional to 641,721.57, 885,582.77 and 355,246.44 is: 490,243.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,721.57 : 885,582.77 = 355,246.44 : x
  2. Step 2: Convert to fraction form
    641,721.57/885,582.77 = 355,246.44/x
  3. Step 3: Cross multiply
    641,721.57x = 885,582.77 × 355,246.44
  4. Step 4: Simplify right side
    641,721.57x = 314,600,126,367.84
  5. Step 5: Solve for x
    x = 314,600,126,367.84/641,721.57
  6. Step 6: Final answer
    x = 490,243.96

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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.