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Finding the Fourth Proportional to 305,342.57, 421,379.51 and 169,372.10

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Solution

The fourth proportional to 305,342.57, 421,379.51 and 169,372.10 is: 233,737.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,342.57 : 421,379.51 = 169,372.10 : x
  2. Step 2: Convert to fraction form
    305,342.57/421,379.51 = 169,372.10/x
  3. Step 3: Cross multiply
    305,342.57x = 421,379.51 × 169,372.10
  4. Step 4: Simplify right side
    305,342.57x = 71,369,932,505.67
  5. Step 5: Solve for x
    x = 71,369,932,505.67/305,342.57
  6. Step 6: Final answer
    x = 233,737.25

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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.