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Finding the Fourth Proportional to 870,856.92, 1,201,716.20 and 488,809.89

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Solution

The fourth proportional to 870,856.92, 1,201,716.20 and 488,809.89 is: 674,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,856.92 : 1,201,716.20 = 488,809.89 : x
  2. Step 2: Convert to fraction form
    870,856.92/1,201,716.20 = 488,809.89/x
  3. Step 3: Cross multiply
    870,856.92x = 1,201,716.20 × 488,809.89
  4. Step 4: Simplify right side
    870,856.92x = 587,410,764,755.24
  5. Step 5: Solve for x
    x = 587,410,764,755.24/870,856.92
  6. Step 6: Final answer
    x = 674,520.41

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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.