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Finding the Fourth Proportional to 636,671.36, 878,589.20 and 361,079.80

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Solution

The fourth proportional to 636,671.36, 878,589.20 and 361,079.80 is: 498,280.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,671.36 : 878,589.20 = 361,079.80 : x
  2. Step 2: Convert to fraction form
    636,671.36/878,589.20 = 361,079.80/x
  3. Step 3: Cross multiply
    636,671.36x = 878,589.20 × 361,079.80
  4. Step 4: Simplify right side
    636,671.36x = 317,240,812,618.16
  5. Step 5: Solve for x
    x = 317,240,812,618.16/636,671.36
  6. Step 6: Final answer
    x = 498,280.33

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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.