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Finding the Fourth Proportional to 636,690.36, 878,134.77 and 394,836.24

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Solution

The fourth proportional to 636,690.36, 878,134.77 and 394,836.24 is: 544,565.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,690.36 : 878,134.77 = 394,836.24 : x
  2. Step 2: Convert to fraction form
    636,690.36/878,134.77 = 394,836.24/x
  3. Step 3: Cross multiply
    636,690.36x = 878,134.77 × 394,836.24
  4. Step 4: Simplify right side
    636,690.36x = 346,719,430,800.07
  5. Step 5: Solve for x
    x = 346,719,430,800.07/636,690.36
  6. Step 6: Final answer
    x = 544,565.23

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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.