Home / 865,769,105.78-1,298,635,464.20-210,723,786.53

Finding the Fourth Proportional to 865,769,105.78, 1,298,635,464.20 and 210,723,786.53

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Solution

The fourth proportional to 865,769,105.78, 1,298,635,464.20 and 210,723,786.53 is: 316,081,251.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,769,105.78 : 1,298,635,464.20 = 210,723,786.53 : x
  2. Step 2: Convert to fraction form
    865,769,105.78/1,298,635,464.20 = 210,723,786.53/x
  3. Step 3: Cross multiply
    865,769,105.78x = 1,298,635,464.20 × 210,723,786.53
  4. Step 4: Simplify right side
    865,769,105.78x = 273,653,382,335,691,328
  5. Step 5: Solve for x
    x = 273,653,382,335,691,328/865,769,105.78
  6. Step 6: Final answer
    x = 316,081,251.35

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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.