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Finding the Fourth Proportional to 393,710.25, 590,659.44 and 127,471.05

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Solution

The fourth proportional to 393,710.25, 590,659.44 and 127,471.05 is: 191,237.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,710.25 : 590,659.44 = 127,471.05 : x
  2. Step 2: Convert to fraction form
    393,710.25/590,659.44 = 127,471.05/x
  3. Step 3: Cross multiply
    393,710.25x = 590,659.44 × 127,471.05
  4. Step 4: Simplify right side
    393,710.25x = 75,291,979,009.21
  5. Step 5: Solve for x
    x = 75,291,979,009.21/393,710.25
  6. Step 6: Final answer
    x = 191,237.03

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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.