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Finding the Fourth Proportional to 393,957.20, 590,940.60 and 127,715.60

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Solution

The fourth proportional to 393,957.20, 590,940.60 and 127,715.60 is: 191,574.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,957.20 : 590,940.60 = 127,715.60 : x
  2. Step 2: Convert to fraction form
    393,957.20/590,940.60 = 127,715.60/x
  3. Step 3: Cross multiply
    393,957.20x = 590,940.60 × 127,715.60
  4. Step 4: Simplify right side
    393,957.20x = 75,472,333,293.36
  5. Step 5: Solve for x
    x = 75,472,333,293.36/393,957.20
  6. Step 6: Final answer
    x = 191,574.96

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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.