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Finding the Fourth Proportional to 2,808.52, 4,213.42 and 860.60

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Solution

The fourth proportional to 2,808.52, 4,213.42 and 860.60 is: 1,291.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.52 : 4,213.42 = 860.60 : x
  2. Step 2: Convert to fraction form
    2,808.52/4,213.42 = 860.60/x
  3. Step 3: Cross multiply
    2,808.52x = 4,213.42 × 860.60
  4. Step 4: Simplify right side
    2,808.52x = 3,626,069.25
  5. Step 5: Solve for x
    x = 3,626,069.25/2,808.52
  6. Step 6: Final answer
    x = 1,291.10

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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.