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Finding the Fourth Proportional to 639,711.70, 959,697.15 and 219,030.10

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Solution

The fourth proportional to 639,711.70, 959,697.15 and 219,030.10 is: 328,589.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,711.70 : 959,697.15 = 219,030.10 : x
  2. Step 2: Convert to fraction form
    639,711.70/959,697.15 = 219,030.10/x
  3. Step 3: Cross multiply
    639,711.70x = 959,697.15 × 219,030.10
  4. Step 4: Simplify right side
    639,711.70x = 210,202,562,734.22
  5. Step 5: Solve for x
    x = 210,202,562,734.22/639,711.70
  6. Step 6: Final answer
    x = 328,589.52

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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.