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Finding the Fourth Proportional to 861,715.71, 1,293,164.01 and 300,750.21

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Solution

The fourth proportional to 861,715.71, 1,293,164.01 and 300,750.21 is: 451,331.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,715.71 : 1,293,164.01 = 300,750.21 : x
  2. Step 2: Convert to fraction form
    861,715.71/1,293,164.01 = 300,750.21/x
  3. Step 3: Cross multiply
    861,715.71x = 1,293,164.01 × 300,750.21
  4. Step 4: Simplify right side
    861,715.71x = 388,919,347,571.94
  5. Step 5: Solve for x
    x = 388,919,347,571.94/861,715.71
  6. Step 6: Final answer
    x = 451,331.39

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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.