Home / 865,769,109.78-1,298,635,470.19-210,723,790.53

Finding the Fourth Proportional to 865,769,109.78, 1,298,635,470.19 and 210,723,790.53

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Solution

The fourth proportional to 865,769,109.78, 1,298,635,470.19 and 210,723,790.53 is: 316,081,257.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,769,109.78 : 1,298,635,470.19 = 210,723,790.53 : x
  2. Step 2: Convert to fraction form
    865,769,109.78/1,298,635,470.19 = 210,723,790.53/x
  3. Step 3: Cross multiply
    865,769,109.78x = 1,298,635,470.19 × 210,723,790.53
  4. Step 4: Simplify right side
    865,769,109.78x = 273,653,388,795,145,632
  5. Step 5: Solve for x
    x = 273,653,388,795,145,632/865,769,109.78
  6. Step 6: Final answer
    x = 316,081,257.35

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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.