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Finding the Fourth Proportional to 393,065.28, 542,427.39 and 223,299.45

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Solution

The fourth proportional to 393,065.28, 542,427.39 and 223,299.45 is: 308,151.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,065.28 : 542,427.39 = 223,299.45 : x
  2. Step 2: Convert to fraction form
    393,065.28/542,427.39 = 223,299.45/x
  3. Step 3: Cross multiply
    393,065.28x = 542,427.39 × 223,299.45
  4. Step 4: Simplify right side
    393,065.28x = 121,123,737,851.94
  5. Step 5: Solve for x
    x = 121,123,737,851.94/393,065.28
  6. Step 6: Final answer
    x = 308,151.71

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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.