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Finding the Fourth Proportional to 289,959.20, 434,593.20 and 121,479.20

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Solution

The fourth proportional to 289,959.20, 434,593.20 and 121,479.20 is: 182,074.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,959.20 : 434,593.20 = 121,479.20 : x
  2. Step 2: Convert to fraction form
    289,959.20/434,593.20 = 121,479.20/x
  3. Step 3: Cross multiply
    289,959.20x = 434,593.20 × 121,479.20
  4. Step 4: Simplify right side
    289,959.20x = 52,794,034,261.44
  5. Step 5: Solve for x
    x = 52,794,034,261.44/289,959.20
  6. Step 6: Final answer
    x = 182,074.01

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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.