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Finding the Fourth Proportional to 825,728.70, 1,239,745.05 and 528,051.90

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Solution

The fourth proportional to 825,728.70, 1,239,745.05 and 528,051.90 is: 792,814.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,728.70 : 1,239,745.05 = 528,051.90 : x
  2. Step 2: Convert to fraction form
    825,728.70/1,239,745.05 = 528,051.90/x
  3. Step 3: Cross multiply
    825,728.70x = 1,239,745.05 × 528,051.90
  4. Step 4: Simplify right side
    825,728.70x = 654,649,729,168.10
  5. Step 5: Solve for x
    x = 654,649,729,168.10/825,728.70
  6. Step 6: Final answer
    x = 792,814.55

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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.