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Finding the Fourth Proportional to 4,239, 6,358.94 and 1,161

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Solution

The fourth proportional to 4,239, 6,358.94 and 1,161 is: 1,741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,239 : 6,358.94 = 1,161 : x
  2. Step 2: Convert to fraction form
    4,239/6,358.94 = 1,161/x
  3. Step 3: Cross multiply
    4,239x = 6,358.94 × 1,161
  4. Step 4: Simplify right side
    4,239x = 7,382,729.34
  5. Step 5: Solve for x
    x = 7,382,729.34/4,239
  6. Step 6: Final answer
    x = 1,741.62

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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.