Home / 287,610.21-397,619.55-215,865.68

Finding the Fourth Proportional to 287,610.21, 397,619.55 and 215,865.68

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Solution

The fourth proportional to 287,610.21, 397,619.55 and 215,865.68 is: 298,433.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,610.21 : 397,619.55 = 215,865.68 : x
  2. Step 2: Convert to fraction form
    287,610.21/397,619.55 = 215,865.68/x
  3. Step 3: Cross multiply
    287,610.21x = 397,619.55 × 215,865.68
  4. Step 4: Simplify right side
    287,610.21x = 85,832,412,553.95
  5. Step 5: Solve for x
    x = 85,832,412,553.95/287,610.21
  6. Step 6: Final answer
    x = 298,433.12

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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.