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Finding the Fourth Proportional to 289,910.20, 434,519.70 and 121,430.20

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Solution

The fourth proportional to 289,910.20, 434,519.70 and 121,430.20 is: 182,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,910.20 : 434,519.70 = 121,430.20 : x
  2. Step 2: Convert to fraction form
    289,910.20/434,519.70 = 121,430.20/x
  3. Step 3: Cross multiply
    289,910.20x = 434,519.70 × 121,430.20
  4. Step 4: Simplify right side
    289,910.20x = 52,763,814,074.94
  5. Step 5: Solve for x
    x = 52,763,814,074.94/289,910.20
  6. Step 6: Final answer
    x = 182,000.54

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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.