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Finding the Fourth Proportional to 290,404.26, 435,628.26 and 80,040.38

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Solution

The fourth proportional to 290,404.26, 435,628.26 and 80,040.38 is: 120,066.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,404.26 : 435,628.26 = 80,040.38 : x
  2. Step 2: Convert to fraction form
    290,404.26/435,628.26 = 80,040.38/x
  3. Step 3: Cross multiply
    290,404.26x = 435,628.26 × 80,040.38
  4. Step 4: Simplify right side
    290,404.26x = 34,867,849,291.00
  5. Step 5: Solve for x
    x = 34,867,849,291.00/290,404.26
  6. Step 6: Final answer
    x = 120,066.59

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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.