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Finding the Fourth Proportional to 636,517.26, 878,145.21 and 364,439.75

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Solution

The fourth proportional to 636,517.26, 878,145.21 and 364,439.75 is: 502,784.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,517.26 : 878,145.21 = 364,439.75 : x
  2. Step 2: Convert to fraction form
    636,517.26/878,145.21 = 364,439.75/x
  3. Step 3: Cross multiply
    636,517.26x = 878,145.21 × 364,439.75
  4. Step 4: Simplify right side
    636,517.26x = 320,031,016,405.37
  5. Step 5: Solve for x
    x = 320,031,016,405.37/636,517.26
  6. Step 6: Final answer
    x = 502,784.51

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Double scale
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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.