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Finding the Fourth Proportional to 809,959.80, 1,213,902.90 and 716,647.80

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Solution

The fourth proportional to 809,959.80, 1,213,902.90 and 716,647.80 is: 1,074,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,959.80 : 1,213,902.90 = 716,647.80 : x
  2. Step 2: Convert to fraction form
    809,959.80/1,213,902.90 = 716,647.80/x
  3. Step 3: Cross multiply
    809,959.80x = 1,213,902.90 × 716,647.80
  4. Step 4: Simplify right side
    809,959.80x = 869,940,842,698.62
  5. Step 5: Solve for x
    x = 869,940,842,698.62/809,959.80
  6. Step 6: Final answer
    x = 1,074,054.35

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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.