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Finding the Fourth Proportional to 393,305.76, 589,959.18 and 168,520.50

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Solution

The fourth proportional to 393,305.76, 589,959.18 and 168,520.50 is: 252,780.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,305.76 : 589,959.18 = 168,520.50 : x
  2. Step 2: Convert to fraction form
    393,305.76/589,959.18 = 168,520.50/x
  3. Step 3: Cross multiply
    393,305.76x = 589,959.18 × 168,520.50
  4. Step 4: Simplify right side
    393,305.76x = 99,420,215,993.19
  5. Step 5: Solve for x
    x = 99,420,215,993.19/393,305.76
  6. Step 6: Final answer
    x = 252,780.98

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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.