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Finding the Fourth Proportional to 823,966.40, 1,236,871.20 and 769,822.40

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Solution

The fourth proportional to 823,966.40, 1,236,871.20 and 769,822.40 is: 1,155,594.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,966.40 : 1,236,871.20 = 769,822.40 : x
  2. Step 2: Convert to fraction form
    823,966.40/1,236,871.20 = 769,822.40/x
  3. Step 3: Cross multiply
    823,966.40x = 1,236,871.20 × 769,822.40
  4. Step 4: Simplify right side
    823,966.40x = 952,171,155,674.88
  5. Step 5: Solve for x
    x = 952,171,155,674.88/823,966.40
  6. Step 6: Final answer
    x = 1,155,594.64

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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.