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Finding the Fourth Proportional to 305,241.50, 421,234.47 and 169,288.07

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Solution

The fourth proportional to 305,241.50, 421,234.47 and 169,288.07 is: 233,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,241.50 : 421,234.47 = 169,288.07 : x
  2. Step 2: Convert to fraction form
    305,241.50/421,234.47 = 169,288.07/x
  3. Step 3: Cross multiply
    305,241.50x = 421,234.47 × 169,288.07
  4. Step 4: Simplify right side
    305,241.50x = 71,309,968,337.60
  5. Step 5: Solve for x
    x = 71,309,968,337.60/305,241.50
  6. Step 6: Final answer
    x = 233,618.20

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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.