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Finding the Fourth Proportional to 2,615,625.78, 3,921,321.15 and 817,583.46

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Solution

The fourth proportional to 2,615,625.78, 3,921,321.15 and 817,583.46 is: 1,225,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615,625.78 : 3,921,321.15 = 817,583.46 : x
  2. Step 2: Convert to fraction form
    2,615,625.78/3,921,321.15 = 817,583.46/x
  3. Step 3: Cross multiply
    2,615,625.78x = 3,921,321.15 × 817,583.46
  4. Step 4: Simplify right side
    2,615,625.78x = 3,206,007,313,588.18
  5. Step 5: Solve for x
    x = 3,206,007,313,588.18/2,615,625.78
  6. Step 6: Final answer
    x = 1,225,713.30

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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.