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Finding the Fourth Proportional to 347,615, 479,708.70 and 188,639

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Solution

The fourth proportional to 347,615, 479,708.70 and 188,639 is: 260,321.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,615 : 479,708.70 = 188,639 : x
  2. Step 2: Convert to fraction form
    347,615/479,708.70 = 188,639/x
  3. Step 3: Cross multiply
    347,615x = 479,708.70 × 188,639
  4. Step 4: Simplify right side
    347,615x = 90,491,769,459.30
  5. Step 5: Solve for x
    x = 90,491,769,459.30/347,615
  6. Step 6: Final answer
    x = 260,321.82

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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.