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Finding the Fourth Proportional to 393,889.98, 590,711.04 and 127,588.71

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Solution

The fourth proportional to 393,889.98, 590,711.04 and 127,588.71 is: 191,342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,889.98 : 590,711.04 = 127,588.71 : x
  2. Step 2: Convert to fraction form
    393,889.98/590,711.04 = 127,588.71/x
  3. Step 3: Cross multiply
    393,889.98x = 590,711.04 × 127,588.71
  4. Step 4: Simplify right side
    393,889.98x = 75,368,059,576.36
  5. Step 5: Solve for x
    x = 75,368,059,576.36/393,889.98
  6. Step 6: Final answer
    x = 191,342.92

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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.