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Finding the Fourth Proportional to 393,276.60, 590,001.30 and 126,991.80

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Solution

The fourth proportional to 393,276.60, 590,001.30 and 126,991.80 is: 190,515.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,276.60 : 590,001.30 = 126,991.80 : x
  2. Step 2: Convert to fraction form
    393,276.60/590,001.30 = 126,991.80/x
  3. Step 3: Cross multiply
    393,276.60x = 590,001.30 × 126,991.80
  4. Step 4: Simplify right side
    393,276.60x = 74,925,327,089.34
  5. Step 5: Solve for x
    x = 74,925,327,089.34/393,276.60
  6. Step 6: Final answer
    x = 190,515.60

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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.