Home / 378,166.50-521,869.77-208,400.63

Finding the Fourth Proportional to 378,166.50, 521,869.77 and 208,400.63

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Solution

The fourth proportional to 378,166.50, 521,869.77 and 208,400.63 is: 287,592.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,166.50 : 521,869.77 = 208,400.63 : x
  2. Step 2: Convert to fraction form
    378,166.50/521,869.77 = 208,400.63/x
  3. Step 3: Cross multiply
    378,166.50x = 521,869.77 × 208,400.63
  4. Step 4: Simplify right side
    378,166.50x = 108,757,988,845.96
  5. Step 5: Solve for x
    x = 108,757,988,845.96/378,166.50
  6. Step 6: Final answer
    x = 287,592.87

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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.