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Finding the Fourth Proportional to 393,268.90, 589,903.35 and 156,781.30

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Solution

The fourth proportional to 393,268.90, 589,903.35 and 156,781.30 is: 235,171.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,268.90 : 589,903.35 = 156,781.30 : x
  2. Step 2: Convert to fraction form
    393,268.90/589,903.35 = 156,781.30/x
  3. Step 3: Cross multiply
    393,268.90x = 589,903.35 × 156,781.30
  4. Step 4: Simplify right side
    393,268.90x = 92,485,814,087.36
  5. Step 5: Solve for x
    x = 92,485,814,087.36/393,268.90
  6. Step 6: Final answer
    x = 235,171.95

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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.