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Finding the Fourth Proportional to 386,344.26, 579,510.22 and 105,861.51

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Solution

The fourth proportional to 386,344.26, 579,510.22 and 105,861.51 is: 158,790.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,344.26 : 579,510.22 = 105,861.51 : x
  2. Step 2: Convert to fraction form
    386,344.26/579,510.22 = 105,861.51/x
  3. Step 3: Cross multiply
    386,344.26x = 579,510.22 × 105,861.51
  4. Step 4: Simplify right side
    386,344.26x = 61,347,826,949.63
  5. Step 5: Solve for x
    x = 61,347,826,949.63/386,344.26
  6. Step 6: Final answer
    x = 158,790.57

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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.