Home / 378,087.22-521,741.28-208,317.70

Finding the Fourth Proportional to 378,087.22, 521,741.28 and 208,317.70

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Solution

The fourth proportional to 378,087.22, 521,741.28 and 208,317.70 is: 287,467.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,087.22 : 521,741.28 = 208,317.70 : x
  2. Step 2: Convert to fraction form
    378,087.22/521,741.28 = 208,317.70/x
  3. Step 3: Cross multiply
    378,087.22x = 521,741.28 × 208,317.70
  4. Step 4: Simplify right side
    378,087.22x = 108,687,943,444.66
  5. Step 5: Solve for x
    x = 108,687,943,444.66/378,087.22
  6. Step 6: Final answer
    x = 287,467.91

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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.