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Finding the Fourth Proportional to 675,861.12, 932,896.08 and 389,572.56

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Solution

The fourth proportional to 675,861.12, 932,896.08 and 389,572.56 is: 537,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,861.12 : 932,896.08 = 389,572.56 : x
  2. Step 2: Convert to fraction form
    675,861.12/932,896.08 = 389,572.56/x
  3. Step 3: Cross multiply
    675,861.12x = 932,896.08 × 389,572.56
  4. Step 4: Simplify right side
    675,861.12x = 363,430,714,099.57
  5. Step 5: Solve for x
    x = 363,430,714,099.57/675,861.12
  6. Step 6: Final answer
    x = 537,729.87

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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.