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Finding the Fourth Proportional to 342,369.56, 513,453.94 and 128,983.50

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Solution

The fourth proportional to 342,369.56, 513,453.94 and 128,983.50 is: 193,437.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,369.56 : 513,453.94 = 128,983.50 : x
  2. Step 2: Convert to fraction form
    342,369.56/513,453.94 = 128,983.50/x
  3. Step 3: Cross multiply
    342,369.56x = 513,453.94 × 128,983.50
  4. Step 4: Simplify right side
    342,369.56x = 66,227,085,947.53
  5. Step 5: Solve for x
    x = 66,227,085,947.53/342,369.56
  6. Step 6: Final answer
    x = 193,437.42

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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.