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Finding the Fourth Proportional to 305,006.70, 420,909.28 and 169,049.42

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Solution

The fourth proportional to 305,006.70, 420,909.28 and 169,049.42 is: 233,288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,006.70 : 420,909.28 = 169,049.42 : x
  2. Step 2: Convert to fraction form
    305,006.70/420,909.28 = 169,049.42/x
  3. Step 3: Cross multiply
    305,006.70x = 420,909.28 × 169,049.42
  4. Step 4: Simplify right side
    305,006.70x = 71,154,469,656.62
  5. Step 5: Solve for x
    x = 71,154,469,656.62/305,006.70
  6. Step 6: Final answer
    x = 233,288.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.