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Finding the Fourth Proportional to 400,689.10, 552,940.59 and 219,398.95

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Solution

The fourth proportional to 400,689.10, 552,940.59 and 219,398.95 is: 302,764.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,689.10 : 552,940.59 = 219,398.95 : x
  2. Step 2: Convert to fraction form
    400,689.10/552,940.59 = 219,398.95/x
  3. Step 3: Cross multiply
    400,689.10x = 552,940.59 × 219,398.95
  4. Step 4: Simplify right side
    400,689.10x = 121,314,584,858.38
  5. Step 5: Solve for x
    x = 121,314,584,858.38/400,689.10
  6. Step 6: Final answer
    x = 302,764.87

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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.