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Finding the Fourth Proportional to 279,771.50, 386,085.15 and 152,447.09

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Solution

The fourth proportional to 279,771.50, 386,085.15 and 152,447.09 is: 210,377.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,771.50 : 386,085.15 = 152,447.09 : x
  2. Step 2: Convert to fraction form
    279,771.50/386,085.15 = 152,447.09/x
  3. Step 3: Cross multiply
    279,771.50x = 386,085.15 × 152,447.09
  4. Step 4: Simplify right side
    279,771.50x = 58,857,555,679.29
  5. Step 5: Solve for x
    x = 58,857,555,679.29/279,771.50
  6. Step 6: Final answer
    x = 210,377.24

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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.