Home / 641,587.76-885,380.38-355,101.70

Finding the Fourth Proportional to 641,587.76, 885,380.38 and 355,101.70

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Solution

The fourth proportional to 641,587.76, 885,380.38 and 355,101.70 is: 490,034.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,587.76 : 885,380.38 = 355,101.70 : x
  2. Step 2: Convert to fraction form
    641,587.76/885,380.38 = 355,101.70/x
  3. Step 3: Cross multiply
    641,587.76x = 885,380.38 × 355,101.70
  4. Step 4: Simplify right side
    641,587.76x = 314,400,078,084.65
  5. Step 5: Solve for x
    x = 314,400,078,084.65/641,587.76
  6. Step 6: Final answer
    x = 490,034.41

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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.