Home / 641,738.21-885,320.74-386,947.85

Finding the Fourth Proportional to 641,738.21, 885,320.74 and 386,947.85

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Solution

The fourth proportional to 641,738.21, 885,320.74 and 386,947.85 is: 533,820.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,738.21 : 885,320.74 = 386,947.85 : x
  2. Step 2: Convert to fraction form
    641,738.21/885,320.74 = 386,947.85/x
  3. Step 3: Cross multiply
    641,738.21x = 885,320.74 × 386,947.85
  4. Step 4: Simplify right side
    641,738.21x = 342,572,956,903.41
  5. Step 5: Solve for x
    x = 342,572,956,903.41/641,738.21
  6. Step 6: Final answer
    x = 533,820.41

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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.