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Finding the Fourth Proportional to 3,167.92, 4,751.16 and 859.60

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Solution

The fourth proportional to 3,167.92, 4,751.16 and 859.60 is: 1,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,167.92 : 4,751.16 = 859.60 : x
  2. Step 2: Convert to fraction form
    3,167.92/4,751.16 = 859.60/x
  3. Step 3: Cross multiply
    3,167.92x = 4,751.16 × 859.60
  4. Step 4: Simplify right side
    3,167.92x = 4,084,097.14
  5. Step 5: Solve for x
    x = 4,084,097.14/3,167.92
  6. Step 6: Final answer
    x = 1,289.20

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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.