Home / 309,723.72-426,966.32-218,919.48

Finding the Fourth Proportional to 309,723.72, 426,966.32 and 218,919.48

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Solution

The fourth proportional to 309,723.72, 426,966.32 and 218,919.48 is: 301,789.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,723.72 : 426,966.32 = 218,919.48 : x
  2. Step 2: Convert to fraction form
    309,723.72/426,966.32 = 218,919.48/x
  3. Step 3: Cross multiply
    309,723.72x = 426,966.32 × 218,919.48
  4. Step 4: Simplify right side
    309,723.72x = 93,471,244,751.91
  5. Step 5: Solve for x
    x = 93,471,244,751.91/309,723.72
  6. Step 6: Final answer
    x = 301,789.11

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1.5x scale

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.