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Finding the Fourth Proportional to 424,286.80, 636,415.80 and 108,746.80

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Solution

The fourth proportional to 424,286.80, 636,415.80 and 108,746.80 is: 163,116.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,286.80 : 636,415.80 = 108,746.80 : x
  2. Step 2: Convert to fraction form
    424,286.80/636,415.80 = 108,746.80/x
  3. Step 3: Cross multiply
    424,286.80x = 636,415.80 × 108,746.80
  4. Step 4: Simplify right side
    424,286.80x = 69,208,181,719.44
  5. Step 5: Solve for x
    x = 69,208,181,719.44/424,286.80
  6. Step 6: Final answer
    x = 163,116.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.