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Finding the Fourth Proportional to 393,454.80, 589,793.40 and 156,481.20

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Solution

The fourth proportional to 393,454.80, 589,793.40 and 156,481.20 is: 234,567.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,454.80 : 589,793.40 = 156,481.20 : x
  2. Step 2: Convert to fraction form
    393,454.80/589,793.40 = 156,481.20/x
  3. Step 3: Cross multiply
    393,454.80x = 589,793.40 × 156,481.20
  4. Step 4: Simplify right side
    393,454.80x = 92,291,578,984.08
  5. Step 5: Solve for x
    x = 92,291,578,984.08/393,454.80
  6. Step 6: Final answer
    x = 234,567.17

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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.