Home / 1,428.17-2,142.47-503.56

Finding the Fourth Proportional to 1,428.17, 2,142.47 and 503.56

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Solution

The fourth proportional to 1,428.17, 2,142.47 and 503.56 is: 755.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.17 : 2,142.47 = 503.56 : x
  2. Step 2: Convert to fraction form
    1,428.17/2,142.47 = 503.56/x
  3. Step 3: Cross multiply
    1,428.17x = 2,142.47 × 503.56
  4. Step 4: Simplify right side
    1,428.17x = 1,078,859.68
  5. Step 5: Solve for x
    x = 1,078,859.68/1,428.17
  6. Step 6: Final answer
    x = 755.42

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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.