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Finding the Fourth Proportional to 1,294,843.56, 1,787,114.88 and 811,822.68

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Solution

The fourth proportional to 1,294,843.56, 1,787,114.88 and 811,822.68 is: 1,120,459.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,843.56 : 1,787,114.88 = 811,822.68 : x
  2. Step 2: Convert to fraction form
    1,294,843.56/1,787,114.88 = 811,822.68/x
  3. Step 3: Cross multiply
    1,294,843.56x = 1,787,114.88 × 811,822.68
  4. Step 4: Simplify right side
    1,294,843.56x = 1,450,820,391,349.48
  5. Step 5: Solve for x
    x = 1,450,820,391,349.48/1,294,843.56
  6. Step 6: Final answer
    x = 1,120,459.98

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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.