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Finding the Fourth Proportional to 490,496.92, 676,863.90 and 286,566.76

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Solution

The fourth proportional to 490,496.92, 676,863.90 and 286,566.76 is: 395,449.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,496.92 : 676,863.90 = 286,566.76 : x
  2. Step 2: Convert to fraction form
    490,496.92/676,863.90 = 286,566.76/x
  3. Step 3: Cross multiply
    490,496.92x = 676,863.90 × 286,566.76
  4. Step 4: Simplify right side
    490,496.92x = 193,966,694,783.96
  5. Step 5: Solve for x
    x = 193,966,694,783.96/490,496.92
  6. Step 6: Final answer
    x = 395,449.36

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Double scale
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Similar ratio
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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.