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Finding the Fourth Proportional to 262,703.75, 394,018.69 and 85,212.31

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Solution

The fourth proportional to 262,703.75, 394,018.69 and 85,212.31 is: 127,806.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,703.75 : 394,018.69 = 85,212.31 : x
  2. Step 2: Convert to fraction form
    262,703.75/394,018.69 = 85,212.31/x
  3. Step 3: Cross multiply
    262,703.75x = 394,018.69 × 85,212.31
  4. Step 4: Simplify right side
    262,703.75x = 33,575,242,758.07
  5. Step 5: Solve for x
    x = 33,575,242,758.07/262,703.75
  6. Step 6: Final answer
    x = 127,806.48

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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.