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Finding the Fourth Proportional to 1,993,734.40, 2,987,037.60 and 1,213,326.40

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Solution

The fourth proportional to 1,993,734.40, 2,987,037.60 and 1,213,326.40 is: 1,817,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,734.40 : 2,987,037.60 = 1,213,326.40 : x
  2. Step 2: Convert to fraction form
    1,993,734.40/2,987,037.60 = 1,213,326.40/x
  3. Step 3: Cross multiply
    1,993,734.40x = 2,987,037.60 × 1,213,326.40
  4. Step 4: Simplify right side
    1,993,734.40x = 3,624,251,577,872.64
  5. Step 5: Solve for x
    x = 3,624,251,577,872.64/1,993,734.40
  6. Step 6: Final answer
    x = 1,817,820.66

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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.