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Finding the Fourth Proportional to 394,987.20, 545,082.02 and 213,699.20

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Solution

The fourth proportional to 394,987.20, 545,082.02 and 213,699.20 is: 294,904.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,987.20 : 545,082.02 = 213,699.20 : x
  2. Step 2: Convert to fraction form
    394,987.20/545,082.02 = 213,699.20/x
  3. Step 3: Cross multiply
    394,987.20x = 545,082.02 × 213,699.20
  4. Step 4: Simplify right side
    394,987.20x = 116,483,591,608.38
  5. Step 5: Solve for x
    x = 116,483,591,608.38/394,987.20
  6. Step 6: Final answer
    x = 294,904.73

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1.5x scale

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.