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Finding the Fourth Proportional to 2,620,972.89, 3,932,405.46 and 915,367.32

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Solution

The fourth proportional to 2,620,972.89, 3,932,405.46 and 915,367.32 is: 1,373,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620,972.89 : 3,932,405.46 = 915,367.32 : x
  2. Step 2: Convert to fraction form
    2,620,972.89/3,932,405.46 = 915,367.32/x
  3. Step 3: Cross multiply
    2,620,972.89x = 3,932,405.46 × 915,367.32
  4. Step 4: Simplify right side
    2,620,972.89x = 3,599,595,447,073.57
  5. Step 5: Solve for x
    x = 3,599,595,447,073.57/2,620,972.89
  6. Step 6: Final answer
    x = 1,373,381.41

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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.