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Finding the Fourth Proportional to 290,321.43, 435,312.64 and 112,620.79

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Solution

The fourth proportional to 290,321.43, 435,312.64 and 112,620.79 is: 168,865.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,321.43 : 435,312.64 = 112,620.79 : x
  2. Step 2: Convert to fraction form
    290,321.43/435,312.64 = 112,620.79/x
  3. Step 3: Cross multiply
    290,321.43x = 435,312.64 × 112,620.79
  4. Step 4: Simplify right side
    290,321.43x = 49,025,253,413.79
  5. Step 5: Solve for x
    x = 49,025,253,413.79/290,321.43
  6. Step 6: Final answer
    x = 168,865.43

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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.