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Finding the Fourth Proportional to 636,589.36, 878,493 and 350,128.72

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Solution

The fourth proportional to 636,589.36, 878,493 and 350,128.72 is: 483,177.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,589.36 : 878,493 = 350,128.72 : x
  2. Step 2: Convert to fraction form
    636,589.36/878,493 = 350,128.72/x
  3. Step 3: Cross multiply
    636,589.36x = 878,493 × 350,128.72
  4. Step 4: Simplify right side
    636,589.36x = 307,585,629,618.96
  5. Step 5: Solve for x
    x = 307,585,629,618.96/636,589.36
  6. Step 6: Final answer
    x = 483,177.46

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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.