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Finding the Fourth Proportional to 2,420.41, 3,630.63 and 860.44

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Solution

The fourth proportional to 2,420.41, 3,630.63 and 860.44 is: 1,290.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.41 : 3,630.63 = 860.44 : x
  2. Step 2: Convert to fraction form
    2,420.41/3,630.63 = 860.44/x
  3. Step 3: Cross multiply
    2,420.41x = 3,630.63 × 860.44
  4. Step 4: Simplify right side
    2,420.41x = 3,123,921.12
  5. Step 5: Solve for x
    x = 3,123,921.12/2,420.41
  6. Step 6: Final answer
    x = 1,290.66

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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.