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Finding the Fourth Proportional to 1,333,330.46, 1,839,982.56 and 721,469.78

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Solution

The fourth proportional to 1,333,330.46, 1,839,982.56 and 721,469.78 is: 995,621.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333,330.46 : 1,839,982.56 = 721,469.78 : x
  2. Step 2: Convert to fraction form
    1,333,330.46/1,839,982.56 = 721,469.78/x
  3. Step 3: Cross multiply
    1,333,330.46x = 1,839,982.56 × 721,469.78
  4. Step 4: Simplify right side
    1,333,330.46x = 1,327,491,812,767.04
  5. Step 5: Solve for x
    x = 1,327,491,812,767.04/1,333,330.46
  6. Step 6: Final answer
    x = 995,621.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.