Home / 641,738.22-885,320.75-386,947.86

Finding the Fourth Proportional to 641,738.22, 885,320.75 and 386,947.86

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Solution

The fourth proportional to 641,738.22, 885,320.75 and 386,947.86 is: 533,820.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,738.22 : 885,320.75 = 386,947.86 : x
  2. Step 2: Convert to fraction form
    641,738.22/885,320.75 = 386,947.86/x
  3. Step 3: Cross multiply
    641,738.22x = 885,320.75 × 386,947.86
  4. Step 4: Simplify right side
    641,738.22x = 342,572,967,691.36
  5. Step 5: Solve for x
    x = 342,572,967,691.36/641,738.22
  6. Step 6: Final answer
    x = 533,820.42

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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.