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Finding the Fourth Proportional to 820,852.80, 1,229,896.80 and 771,086.40

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Solution

The fourth proportional to 820,852.80, 1,229,896.80 and 771,086.40 is: 1,155,331.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,852.80 : 1,229,896.80 = 771,086.40 : x
  2. Step 2: Convert to fraction form
    820,852.80/1,229,896.80 = 771,086.40/x
  3. Step 3: Cross multiply
    820,852.80x = 1,229,896.80 × 771,086.40
  4. Step 4: Simplify right side
    820,852.80x = 948,356,695,883.52
  5. Step 5: Solve for x
    x = 948,356,695,883.52/820,852.80
  6. Step 6: Final answer
    x = 1,155,331.01

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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.