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Finding the Fourth Proportional to 290,330.28, 399,826.26 and 261,403.56

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Solution

The fourth proportional to 290,330.28, 399,826.26 and 261,403.56 is: 359,990.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,330.28 : 399,826.26 = 261,403.56 : x
  2. Step 2: Convert to fraction form
    290,330.28/399,826.26 = 261,403.56/x
  3. Step 3: Cross multiply
    290,330.28x = 399,826.26 × 261,403.56
  4. Step 4: Simplify right side
    290,330.28x = 104,516,007,745.49
  5. Step 5: Solve for x
    x = 104,516,007,745.49/290,330.28
  6. Step 6: Final answer
    x = 359,990.04

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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.