Home / 378,395.20-522,188.90-208,635.36

Finding the Fourth Proportional to 378,395.20, 522,188.90 and 208,635.36

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Solution

The fourth proportional to 378,395.20, 522,188.90 and 208,635.36 is: 287,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,395.20 : 522,188.90 = 208,635.36 : x
  2. Step 2: Convert to fraction form
    378,395.20/522,188.90 = 208,635.36/x
  3. Step 3: Cross multiply
    378,395.20x = 522,188.90 × 208,635.36
  4. Step 4: Simplify right side
    378,395.20x = 108,947,066,268.52
  5. Step 5: Solve for x
    x = 108,947,066,268.52/378,395.20
  6. Step 6: Final answer
    x = 287,918.74

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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.