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Finding the Fourth Proportional to 642,712.22, 962,712.08 and 515,664.62

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Solution

The fourth proportional to 642,712.22, 962,712.08 and 515,664.62 is: 772,408.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,712.22 : 962,712.08 = 515,664.62 : x
  2. Step 2: Convert to fraction form
    642,712.22/962,712.08 = 515,664.62/x
  3. Step 3: Cross multiply
    642,712.22x = 962,712.08 × 515,664.62
  4. Step 4: Simplify right side
    642,712.22x = 496,436,556,324.29
  5. Step 5: Solve for x
    x = 496,436,556,324.29/642,712.22
  6. Step 6: Final answer
    x = 772,408.77

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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.