Home / 287,072.91-396,145.89-219,137.40

Finding the Fourth Proportional to 287,072.91, 396,145.89 and 219,137.40

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Solution

The fourth proportional to 287,072.91, 396,145.89 and 219,137.40 is: 302,398.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,072.91 : 396,145.89 = 219,137.40 : x
  2. Step 2: Convert to fraction form
    287,072.91/396,145.89 = 219,137.40/x
  3. Step 3: Cross multiply
    287,072.91x = 396,145.89 × 219,137.40
  4. Step 4: Simplify right side
    287,072.91x = 86,810,380,355.29
  5. Step 5: Solve for x
    x = 86,810,380,355.29/287,072.91
  6. Step 6: Final answer
    x = 302,398.37

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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.