Home / 378,244.49-521,979.80-208,478.61

Finding the Fourth Proportional to 378,244.49, 521,979.80 and 208,478.61

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Solution

The fourth proportional to 378,244.49, 521,979.80 and 208,478.61 is: 287,701.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,244.49 : 521,979.80 = 208,478.61 : x
  2. Step 2: Convert to fraction form
    378,244.49/521,979.80 = 208,478.61/x
  3. Step 3: Cross multiply
    378,244.49x = 521,979.80 × 208,478.61
  4. Step 4: Simplify right side
    378,244.49x = 108,821,622,109.69
  5. Step 5: Solve for x
    x = 108,821,622,109.69/378,244.49
  6. Step 6: Final answer
    x = 287,701.81

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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.