Home / 378,148.52-521,820.38-208,382.64

Finding the Fourth Proportional to 378,148.52, 521,820.38 and 208,382.64

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Solution

The fourth proportional to 378,148.52, 521,820.38 and 208,382.64 is: 287,554.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,148.52 : 521,820.38 = 208,382.64 : x
  2. Step 2: Convert to fraction form
    378,148.52/521,820.38 = 208,382.64/x
  3. Step 3: Cross multiply
    378,148.52x = 521,820.38 × 208,382.64
  4. Step 4: Simplify right side
    378,148.52x = 108,738,308,390.20
  5. Step 5: Solve for x
    x = 108,738,308,390.20/378,148.52
  6. Step 6: Final answer
    x = 287,554.50

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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.