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Finding the Fourth Proportional to 3,168.22, 4,751.88 and 947

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Solution

The fourth proportional to 3,168.22, 4,751.88 and 947 is: 1,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.22 : 4,751.88 = 947 : x
  2. Step 2: Convert to fraction form
    3,168.22/4,751.88 = 947/x
  3. Step 3: Cross multiply
    3,168.22x = 4,751.88 × 947
  4. Step 4: Simplify right side
    3,168.22x = 4,500,030.36
  5. Step 5: Solve for x
    x = 4,500,030.36/3,168.22
  6. Step 6: Final answer
    x = 1,420.37

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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.