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Finding the Fourth Proportional to 636,371.60, 878,175.96 and 345,974

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Solution

The fourth proportional to 636,371.60, 878,175.96 and 345,974 is: 477,434.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,371.60 : 878,175.96 = 345,974 : x
  2. Step 2: Convert to fraction form
    636,371.60/878,175.96 = 345,974/x
  3. Step 3: Cross multiply
    636,371.60x = 878,175.96 × 345,974
  4. Step 4: Simplify right side
    636,371.60x = 303,826,049,585.04
  5. Step 5: Solve for x
    x = 303,826,049,585.04/636,371.60
  6. Step 6: Final answer
    x = 477,434.96

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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.