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Finding the Fourth Proportional to 305,911.86, 422,152.47 and 169,945.26

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Solution

The fourth proportional to 305,911.86, 422,152.47 and 169,945.26 is: 234,521.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,911.86 : 422,152.47 = 169,945.26 : x
  2. Step 2: Convert to fraction form
    305,911.86/422,152.47 = 169,945.26/x
  3. Step 3: Cross multiply
    305,911.86x = 422,152.47 × 169,945.26
  4. Step 4: Simplify right side
    305,911.86x = 71,742,811,273.79
  5. Step 5: Solve for x
    x = 71,742,811,273.79/305,911.86
  6. Step 6: Final answer
    x = 234,521.18

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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.