Home / 351,621.12-485,138.66-220,812.86

Finding the Fourth Proportional to 351,621.12, 485,138.66 and 220,812.86

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Solution

The fourth proportional to 351,621.12, 485,138.66 and 220,812.86 is: 304,659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,621.12 : 485,138.66 = 220,812.86 : x
  2. Step 2: Convert to fraction form
    351,621.12/485,138.66 = 220,812.86/x
  3. Step 3: Cross multiply
    351,621.12x = 485,138.66 × 220,812.86
  4. Step 4: Simplify right side
    351,621.12x = 107,124,855,011.17
  5. Step 5: Solve for x
    x = 107,124,855,011.17/351,621.12
  6. Step 6: Final answer
    x = 304,659.90

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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.