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Finding the Fourth Proportional to 393,710.93, 590,660.45 and 127,471.72

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Solution

The fourth proportional to 393,710.93, 590,660.45 and 127,471.72 is: 191,238.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,710.93 : 590,660.45 = 127,471.72 : x
  2. Step 2: Convert to fraction form
    393,710.93/590,660.45 = 127,471.72/x
  3. Step 3: Cross multiply
    393,710.93x = 590,660.45 × 127,471.72
  4. Step 4: Simplify right side
    393,710.93x = 75,292,503,497.47
  5. Step 5: Solve for x
    x = 75,292,503,497.47/393,710.93
  6. Step 6: Final answer
    x = 191,238.03

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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.