Home / 1,357.20-2,035.80-331.20

Finding the Fourth Proportional to 1,357.20, 2,035.80 and 331.20

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Solution

The fourth proportional to 1,357.20, 2,035.80 and 331.20 is: 496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.20 : 2,035.80 = 331.20 : x
  2. Step 2: Convert to fraction form
    1,357.20/2,035.80 = 331.20/x
  3. Step 3: Cross multiply
    1,357.20x = 2,035.80 × 331.20
  4. Step 4: Simplify right side
    1,357.20x = 674,256.96
  5. Step 5: Solve for x
    x = 674,256.96/1,357.20
  6. Step 6: Final answer
    x = 496.80

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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.