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Finding the Fourth Proportional to 289,592.20, 434,042.70 and 121,112.20

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Solution

The fourth proportional to 289,592.20, 434,042.70 and 121,112.20 is: 181,523.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,592.20 : 434,042.70 = 121,112.20 : x
  2. Step 2: Convert to fraction form
    289,592.20/434,042.70 = 121,112.20/x
  3. Step 3: Cross multiply
    289,592.20x = 434,042.70 × 121,112.20
  4. Step 4: Simplify right side
    289,592.20x = 52,567,866,290.94
  5. Step 5: Solve for x
    x = 52,567,866,290.94/289,592.20
  6. Step 6: Final answer
    x = 181,523.76

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1.5x scale

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.