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Finding the Fourth Proportional to 290,346.12, 435,349.69 and 112,645.54

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Solution

The fourth proportional to 290,346.12, 435,349.69 and 112,645.54 is: 168,902.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,346.12 : 435,349.69 = 112,645.54 : x
  2. Step 2: Convert to fraction form
    290,346.12/435,349.69 = 112,645.54/x
  3. Step 3: Cross multiply
    290,346.12x = 435,349.69 × 112,645.54
  4. Step 4: Simplify right side
    290,346.12x = 49,040,198,732.61
  5. Step 5: Solve for x
    x = 49,040,198,732.61/290,346.12
  6. Step 6: Final answer
    x = 168,902.55

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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.