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Finding the Fourth Proportional to 6,643,991.60, 9,965,987.40 and 3,612,809.60

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Solution

The fourth proportional to 6,643,991.60, 9,965,987.40 and 3,612,809.60 is: 5,419,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643,991.60 : 9,965,987.40 = 3,612,809.60 : x
  2. Step 2: Convert to fraction form
    6,643,991.60/9,965,987.40 = 3,612,809.60/x
  3. Step 3: Cross multiply
    6,643,991.60x = 9,965,987.40 × 3,612,809.60
  4. Step 4: Simplify right side
    6,643,991.60x = 36,005,214,952,199.04
  5. Step 5: Solve for x
    x = 36,005,214,952,199.04/6,643,991.60
  6. Step 6: Final answer
    x = 5,419,214.40

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Similar ratio
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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.