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Finding the Fourth Proportional to 290,472.58, 435,721.17 and 90,796.75

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Solution

The fourth proportional to 290,472.58, 435,721.17 and 90,796.75 is: 136,198.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,472.58 : 435,721.17 = 90,796.75 : x
  2. Step 2: Convert to fraction form
    290,472.58/435,721.17 = 90,796.75/x
  3. Step 3: Cross multiply
    290,472.58x = 435,721.17 × 90,796.75
  4. Step 4: Simplify right side
    290,472.58x = 39,562,065,393.38
  5. Step 5: Solve for x
    x = 39,562,065,393.38/290,472.58
  6. Step 6: Final answer
    x = 136,198.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.