Home / 1,428.27-2,142.57-503.63

Finding the Fourth Proportional to 1,428.27, 2,142.57 and 503.63

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Solution

The fourth proportional to 1,428.27, 2,142.57 and 503.63 is: 755.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.27 : 2,142.57 = 503.63 : x
  2. Step 2: Convert to fraction form
    1,428.27/2,142.57 = 503.63/x
  3. Step 3: Cross multiply
    1,428.27x = 2,142.57 × 503.63
  4. Step 4: Simplify right side
    1,428.27x = 1,079,066.63
  5. Step 5: Solve for x
    x = 1,079,066.63/1,428.27
  6. Step 6: Final answer
    x = 755.51

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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.