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Finding the Fourth Proportional to 393,701.20, 590,551.80 and 157,080.40

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Solution

The fourth proportional to 393,701.20, 590,551.80 and 157,080.40 is: 235,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,701.20 : 590,551.80 = 157,080.40 : x
  2. Step 2: Convert to fraction form
    393,701.20/590,551.80 = 157,080.40/x
  3. Step 3: Cross multiply
    393,701.20x = 590,551.80 × 157,080.40
  4. Step 4: Simplify right side
    393,701.20x = 92,764,112,964.72
  5. Step 5: Solve for x
    x = 92,764,112,964.72/393,701.20
  6. Step 6: Final answer
    x = 235,620.60

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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.