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Finding the Fourth Proportional to 305,404.12, 421,458.18 and 169,433.80

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Solution

The fourth proportional to 305,404.12, 421,458.18 and 169,433.80 is: 233,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,404.12 : 421,458.18 = 169,433.80 : x
  2. Step 2: Convert to fraction form
    305,404.12/421,458.18 = 169,433.80/x
  3. Step 3: Cross multiply
    305,404.12x = 421,458.18 × 169,433.80
  4. Step 4: Simplify right side
    305,404.12x = 71,409,260,978.48
  5. Step 5: Solve for x
    x = 71,409,260,978.48/305,404.12
  6. Step 6: Final answer
    x = 233,818.92

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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.