Home / 378,181.17-521,890.04-208,415.30

Finding the Fourth Proportional to 378,181.17, 521,890.04 and 208,415.30

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Solution

The fourth proportional to 378,181.17, 521,890.04 and 208,415.30 is: 287,613.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,181.17 : 521,890.04 = 208,415.30 : x
  2. Step 2: Convert to fraction form
    378,181.17/521,890.04 = 208,415.30/x
  3. Step 3: Cross multiply
    378,181.17x = 521,890.04 × 208,415.30
  4. Step 4: Simplify right side
    378,181.17x = 108,769,867,165.20
  5. Step 5: Solve for x
    x = 108,769,867,165.20/378,181.17
  6. Step 6: Final answer
    x = 287,613.12

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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.