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Finding the Fourth Proportional to 870,165.28, 1,200,809.98 and 482,957.97

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Solution

The fourth proportional to 870,165.28, 1,200,809.98 and 482,957.97 is: 666,471.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,165.28 : 1,200,809.98 = 482,957.97 : x
  2. Step 2: Convert to fraction form
    870,165.28/1,200,809.98 = 482,957.97/x
  3. Step 3: Cross multiply
    870,165.28x = 1,200,809.98 × 482,957.97
  4. Step 4: Simplify right side
    870,165.28x = 579,940,750,296.54
  5. Step 5: Solve for x
    x = 579,940,750,296.54/870,165.28
  6. Step 6: Final answer
    x = 666,471.95

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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.