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Finding the Fourth Proportional to 3,539.85, 5,309.75 and 942.78

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Solution

The fourth proportional to 3,539.85, 5,309.75 and 942.78 is: 1,414.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,539.85 : 5,309.75 = 942.78 : x
  2. Step 2: Convert to fraction form
    3,539.85/5,309.75 = 942.78/x
  3. Step 3: Cross multiply
    3,539.85x = 5,309.75 × 942.78
  4. Step 4: Simplify right side
    3,539.85x = 5,005,926.11
  5. Step 5: Solve for x
    x = 5,005,926.11/3,539.85
  6. Step 6: Final answer
    x = 1,414.16

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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.