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Finding the Fourth Proportional to 647,035.40, 970,553.10 and 331,387.40

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Solution

The fourth proportional to 647,035.40, 970,553.10 and 331,387.40 is: 497,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,035.40 : 970,553.10 = 331,387.40 : x
  2. Step 2: Convert to fraction form
    647,035.40/970,553.10 = 331,387.40/x
  3. Step 3: Cross multiply
    647,035.40x = 970,553.10 × 331,387.40
  4. Step 4: Simplify right side
    647,035.40x = 321,629,068,370.94
  5. Step 5: Solve for x
    x = 321,629,068,370.94/647,035.40
  6. Step 6: Final answer
    x = 497,081.10

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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.