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Finding the Fourth Proportional to 439,473.31, 659,162.30 and 139,930.34

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Solution

The fourth proportional to 439,473.31, 659,162.30 and 139,930.34 is: 209,880.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,473.31 : 659,162.30 = 139,930.34 : x
  2. Step 2: Convert to fraction form
    439,473.31/659,162.30 = 139,930.34/x
  3. Step 3: Cross multiply
    439,473.31x = 659,162.30 × 139,930.34
  4. Step 4: Simplify right side
    439,473.31x = 92,236,800,758.72
  5. Step 5: Solve for x
    x = 92,236,800,758.72/439,473.31
  6. Step 6: Final answer
    x = 209,880.33

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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.