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Finding the Fourth Proportional to 378,761.28, 522,879.80 and 235,567.48

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Solution

The fourth proportional to 378,761.28, 522,879.80 and 235,567.48 is: 325,200.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,761.28 : 522,879.80 = 235,567.48 : x
  2. Step 2: Convert to fraction form
    378,761.28/522,879.80 = 235,567.48/x
  3. Step 3: Cross multiply
    378,761.28x = 522,879.80 × 235,567.48
  4. Step 4: Simplify right side
    378,761.28x = 123,173,476,828.90
  5. Step 5: Solve for x
    x = 123,173,476,828.90/378,761.28
  6. Step 6: Final answer
    x = 325,200.81

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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.