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Finding the Fourth Proportional to 290,371.59, 399,785.90 and 247,759.11

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Solution

The fourth proportional to 290,371.59, 399,785.90 and 247,759.11 is: 341,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,371.59 : 399,785.90 = 247,759.11 : x
  2. Step 2: Convert to fraction form
    290,371.59/399,785.90 = 247,759.11/x
  3. Step 3: Cross multiply
    290,371.59x = 399,785.90 × 247,759.11
  4. Step 4: Simplify right side
    290,371.59x = 99,050,597,535.75
  5. Step 5: Solve for x
    x = 99,050,597,535.75/290,371.59
  6. Step 6: Final answer
    x = 341,116.70

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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.