Home / 1,577.21-2,365.14-1,331.78

Finding the Fourth Proportional to 1,577.21, 2,365.14 and 1,331.78

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Solution

The fourth proportional to 1,577.21, 2,365.14 and 1,331.78 is: 1,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.21 : 2,365.14 = 1,331.78 : x
  2. Step 2: Convert to fraction form
    1,577.21/2,365.14 = 1,331.78/x
  3. Step 3: Cross multiply
    1,577.21x = 2,365.14 × 1,331.78
  4. Step 4: Simplify right side
    1,577.21x = 3,149,846.15
  5. Step 5: Solve for x
    x = 3,149,846.15/1,577.21
  6. Step 6: Final answer
    x = 1,997.10

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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.