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Finding the Fourth Proportional to 518,171.38, 715,077.96 and 300,422.37

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Solution

The fourth proportional to 518,171.38, 715,077.96 and 300,422.37 is: 414,583.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,171.38 : 715,077.96 = 300,422.37 : x
  2. Step 2: Convert to fraction form
    518,171.38/715,077.96 = 300,422.37/x
  3. Step 3: Cross multiply
    518,171.38x = 715,077.96 × 300,422.37
  4. Step 4: Simplify right side
    518,171.38x = 214,825,415,477.97
  5. Step 5: Solve for x
    x = 214,825,415,477.97/518,171.38
  6. Step 6: Final answer
    x = 414,583.71

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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.