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Finding the Fourth Proportional to 770,660.80, 1,155,704.42 and 265,079.86

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Solution

The fourth proportional to 770,660.80, 1,155,704.42 and 265,079.86 is: 397,521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,660.80 : 1,155,704.42 = 265,079.86 : x
  2. Step 2: Convert to fraction form
    770,660.80/1,155,704.42 = 265,079.86/x
  3. Step 3: Cross multiply
    770,660.80x = 1,155,704.42 × 265,079.86
  4. Step 4: Simplify right side
    770,660.80x = 306,353,965,854.98
  5. Step 5: Solve for x
    x = 306,353,965,854.98/770,660.80
  6. Step 6: Final answer
    x = 397,521.15

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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.