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Finding the Fourth Proportional to 305,304.60, 421,528.86 and 190,757.64

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Solution

The fourth proportional to 305,304.60, 421,528.86 and 190,757.64 is: 263,375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,304.60 : 421,528.86 = 190,757.64 : x
  2. Step 2: Convert to fraction form
    305,304.60/421,528.86 = 190,757.64/x
  3. Step 3: Cross multiply
    305,304.60x = 421,528.86 × 190,757.64
  4. Step 4: Simplify right side
    305,304.60x = 80,409,850,525.49
  5. Step 5: Solve for x
    x = 80,409,850,525.49/305,304.60
  6. Step 6: Final answer
    x = 263,375.82

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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.