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Finding the Fourth Proportional to 3,145,866, 4,718,816.28 and 781,962

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Solution

The fourth proportional to 3,145,866, 4,718,816.28 and 781,962 is: 1,172,947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145,866 : 4,718,816.28 = 781,962 : x
  2. Step 2: Convert to fraction form
    3,145,866/4,718,816.28 = 781,962/x
  3. Step 3: Cross multiply
    3,145,866x = 4,718,816.28 × 781,962
  4. Step 4: Simplify right side
    3,145,866x = 3,689,935,015,941.36
  5. Step 5: Solve for x
    x = 3,689,935,015,941.36/3,145,866
  6. Step 6: Final answer
    x = 1,172,947.30

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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.