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Finding the Fourth Proportional to 3,900.58, 5,850.90 and 1,560.78

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Solution

The fourth proportional to 3,900.58, 5,850.90 and 1,560.78 is: 2,341.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.58 : 5,850.90 = 1,560.78 : x
  2. Step 2: Convert to fraction form
    3,900.58/5,850.90 = 1,560.78/x
  3. Step 3: Cross multiply
    3,900.58x = 5,850.90 × 1,560.78
  4. Step 4: Simplify right side
    3,900.58x = 9,131,969.35
  5. Step 5: Solve for x
    x = 9,131,969.35/3,900.58
  6. Step 6: Final answer
    x = 2,341.18

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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.