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Finding the Fourth Proportional to 247,505.82, 340,695.09 and 213,621.90

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Solution

The fourth proportional to 247,505.82, 340,695.09 and 213,621.90 is: 294,053.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,505.82 : 340,695.09 = 213,621.90 : x
  2. Step 2: Convert to fraction form
    247,505.82/340,695.09 = 213,621.90/x
  3. Step 3: Cross multiply
    247,505.82x = 340,695.09 × 213,621.90
  4. Step 4: Simplify right side
    247,505.82x = 72,779,932,446.47
  5. Step 5: Solve for x
    x = 72,779,932,446.47/247,505.82
  6. Step 6: Final answer
    x = 294,053.42

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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.