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Finding the Fourth Proportional to 855,611.40, 1,283,417.10 and 809,992.20

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Solution

The fourth proportional to 855,611.40, 1,283,417.10 and 809,992.20 is: 1,214,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,611.40 : 1,283,417.10 = 809,992.20 : x
  2. Step 2: Convert to fraction form
    855,611.40/1,283,417.10 = 809,992.20/x
  3. Step 3: Cross multiply
    855,611.40x = 1,283,417.10 × 809,992.20
  4. Step 4: Simplify right side
    855,611.40x = 1,039,557,840,346.62
  5. Step 5: Solve for x
    x = 1,039,557,840,346.62/855,611.40
  6. Step 6: Final answer
    x = 1,214,988.30

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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.