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Finding the Fourth Proportional to 320,286.60, 480,485.16 and 130,849.92

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Solution

The fourth proportional to 320,286.60, 480,485.16 and 130,849.92 is: 196,297.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,286.60 : 480,485.16 = 130,849.92 : x
  2. Step 2: Convert to fraction form
    320,286.60/480,485.16 = 130,849.92/x
  3. Step 3: Cross multiply
    320,286.60x = 480,485.16 × 130,849.92
  4. Step 4: Simplify right side
    320,286.60x = 62,871,444,747.19
  5. Step 5: Solve for x
    x = 62,871,444,747.19/320,286.60
  6. Step 6: Final answer
    x = 196,297.46

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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.