Home / 257,921.92-387,287.34-218,458.18

Finding the Fourth Proportional to 257,921.92, 387,287.34 and 218,458.18

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Solution

The fourth proportional to 257,921.92, 387,287.34 and 218,458.18 is: 328,029.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,921.92 : 387,287.34 = 218,458.18 : x
  2. Step 2: Convert to fraction form
    257,921.92/387,287.34 = 218,458.18/x
  3. Step 3: Cross multiply
    257,921.92x = 387,287.34 × 218,458.18
  4. Step 4: Simplify right side
    257,921.92x = 84,606,087,433.44
  5. Step 5: Solve for x
    x = 84,606,087,433.44/257,921.92
  6. Step 6: Final answer
    x = 328,029.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.