Home / 1,428.24-2,142.12-504.48

Finding the Fourth Proportional to 1,428.24, 2,142.12 and 504.48

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Solution

The fourth proportional to 1,428.24, 2,142.12 and 504.48 is: 756.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.24 : 2,142.12 = 504.48 : x
  2. Step 2: Convert to fraction form
    1,428.24/2,142.12 = 504.48/x
  3. Step 3: Cross multiply
    1,428.24x = 2,142.12 × 504.48
  4. Step 4: Simplify right side
    1,428.24x = 1,080,656.70
  5. Step 5: Solve for x
    x = 1,080,656.70/1,428.24
  6. Step 6: Final answer
    x = 756.64

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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.