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Finding the Fourth Proportional to 393,132.58, 589,698.88 and 126,932.31

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Solution

The fourth proportional to 393,132.58, 589,698.88 and 126,932.31 is: 190,398.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,132.58 : 589,698.88 = 126,932.31 : x
  2. Step 2: Convert to fraction form
    393,132.58/589,698.88 = 126,932.31/x
  3. Step 3: Cross multiply
    393,132.58x = 589,698.88 × 126,932.31
  4. Step 4: Simplify right side
    393,132.58x = 74,851,840,725.48
  5. Step 5: Solve for x
    x = 74,851,840,725.48/393,132.58
  6. Step 6: Final answer
    x = 190,398.47

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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.