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Finding the Fourth Proportional to 816,653.80, 1,224,980.70 and 779,912.20

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Solution

The fourth proportional to 816,653.80, 1,224,980.70 and 779,912.20 is: 1,169,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,653.80 : 1,224,980.70 = 779,912.20 : x
  2. Step 2: Convert to fraction form
    816,653.80/1,224,980.70 = 779,912.20/x
  3. Step 3: Cross multiply
    816,653.80x = 1,224,980.70 × 779,912.20
  4. Step 4: Simplify right side
    816,653.80x = 955,377,392,694.54
  5. Step 5: Solve for x
    x = 955,377,392,694.54/816,653.80
  6. Step 6: Final answer
    x = 1,169,868.30

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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.