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Finding the Fourth Proportional to 768,378.72, 1,149,713.60 and 482,731.92

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Solution

The fourth proportional to 768,378.72, 1,149,713.60 and 482,731.92 is: 722,304.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,378.72 : 1,149,713.60 = 482,731.92 : x
  2. Step 2: Convert to fraction form
    768,378.72/1,149,713.60 = 482,731.92/x
  3. Step 3: Cross multiply
    768,378.72x = 1,149,713.60 × 482,731.92
  4. Step 4: Simplify right side
    768,378.72x = 555,003,451,164.45
  5. Step 5: Solve for x
    x = 555,003,451,164.45/768,378.72
  6. Step 6: Final answer
    x = 722,304.55

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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.