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Finding the Fourth Proportional to 483,739.92, 667,859.85 and 311,718.60

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Solution

The fourth proportional to 483,739.92, 667,859.85 and 311,718.60 is: 430,364.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,739.92 : 667,859.85 = 311,718.60 : x
  2. Step 2: Convert to fraction form
    483,739.92/667,859.85 = 311,718.60/x
  3. Step 3: Cross multiply
    483,739.92x = 667,859.85 × 311,718.60
  4. Step 4: Simplify right side
    483,739.92x = 208,184,337,438.21
  5. Step 5: Solve for x
    x = 208,184,337,438.21/483,739.92
  6. Step 6: Final answer
    x = 430,364.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.