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Finding the Fourth Proportional to 393,718.88, 590,672.18 and 127,479.48

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Solution

The fourth proportional to 393,718.88, 590,672.18 and 127,479.48 is: 191,249.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,718.88 : 590,672.18 = 127,479.48 : x
  2. Step 2: Convert to fraction form
    393,718.88/590,672.18 = 127,479.48/x
  3. Step 3: Cross multiply
    393,718.88x = 590,672.18 × 127,479.48
  4. Step 4: Simplify right side
    393,718.88x = 75,298,582,356.87
  5. Step 5: Solve for x
    x = 75,298,582,356.87/393,718.88
  6. Step 6: Final answer
    x = 191,249.61

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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.