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Finding the Fourth Proportional to 636,427.43, 878,301.38 and 394,787.86

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Solution

The fourth proportional to 636,427.43, 878,301.38 and 394,787.86 is: 544,826.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,427.43 : 878,301.38 = 394,787.86 : x
  2. Step 2: Convert to fraction form
    636,427.43/878,301.38 = 394,787.86/x
  3. Step 3: Cross multiply
    636,427.43x = 878,301.38 × 394,787.86
  4. Step 4: Simplify right side
    636,427.43x = 346,742,722,683.28
  5. Step 5: Solve for x
    x = 346,742,722,683.28/636,427.43
  6. Step 6: Final answer
    x = 544,826.80

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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.