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Finding the Fourth Proportional to 262,882.56, 394,381.62 and 85,408.32

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Solution

The fourth proportional to 262,882.56, 394,381.62 and 85,408.32 is: 128,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,882.56 : 394,381.62 = 85,408.32 : x
  2. Step 2: Convert to fraction form
    262,882.56/394,381.62 = 85,408.32/x
  3. Step 3: Cross multiply
    262,882.56x = 394,381.62 × 85,408.32
  4. Step 4: Simplify right side
    262,882.56x = 33,683,471,603.08
  5. Step 5: Solve for x
    x = 33,683,471,603.08/262,882.56
  6. Step 6: Final answer
    x = 128,131.25

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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.