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Finding the Fourth Proportional to 393,903.70, 590,731.62 and 127,602.43

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Solution

The fourth proportional to 393,903.70, 590,731.62 and 127,602.43 is: 191,363.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,903.70 : 590,731.62 = 127,602.43 : x
  2. Step 2: Convert to fraction form
    393,903.70/590,731.62 = 127,602.43/x
  3. Step 3: Cross multiply
    393,903.70x = 590,731.62 × 127,602.43
  4. Step 4: Simplify right side
    393,903.70x = 75,378,790,189.84
  5. Step 5: Solve for x
    x = 75,378,790,189.84/393,903.70
  6. Step 6: Final answer
    x = 191,363.50

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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.