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Finding the Fourth Proportional to 378,053.64, 521,713.71 and 208,287.77

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Solution

The fourth proportional to 378,053.64, 521,713.71 and 208,287.77 is: 287,436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,053.64 : 521,713.71 = 208,287.77 : x
  2. Step 2: Convert to fraction form
    378,053.64/521,713.71 = 208,287.77/x
  3. Step 3: Cross multiply
    378,053.64x = 521,713.71 × 208,287.77
  4. Step 4: Simplify right side
    378,053.64x = 108,666,582,625.76
  5. Step 5: Solve for x
    x = 108,666,582,625.76/378,053.64
  6. Step 6: Final answer
    x = 287,436.94

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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.