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Finding the Fourth Proportional to 393,957.70, 590,941.35 and 127,716.10

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Solution

The fourth proportional to 393,957.70, 590,941.35 and 127,716.10 is: 191,575.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,957.70 : 590,941.35 = 127,716.10 : x
  2. Step 2: Convert to fraction form
    393,957.70/590,941.35 = 127,716.10/x
  3. Step 3: Cross multiply
    393,957.70x = 590,941.35 × 127,716.10
  4. Step 4: Simplify right side
    393,957.70x = 75,472,724,550.74
  5. Step 5: Solve for x
    x = 75,472,724,550.74/393,957.70
  6. Step 6: Final answer
    x = 191,575.71

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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.