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Finding the Fourth Proportional to 3,168.80, 4,753.17 and 860.30

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Solution

The fourth proportional to 3,168.80, 4,753.17 and 860.30 is: 1,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.80 : 4,753.17 = 860.30 : x
  2. Step 2: Convert to fraction form
    3,168.80/4,753.17 = 860.30/x
  3. Step 3: Cross multiply
    3,168.80x = 4,753.17 × 860.30
  4. Step 4: Simplify right side
    3,168.80x = 4,089,152.15
  5. Step 5: Solve for x
    x = 4,089,152.15/3,168.80
  6. Step 6: Final answer
    x = 1,290.44

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1.5x scale

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.