Home / 1,428.32-2,136.20-1,243.03

Finding the Fourth Proportional to 1,428.32, 2,136.20 and 1,243.03

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Solution

The fourth proportional to 1,428.32, 2,136.20 and 1,243.03 is: 1,859.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.32 : 2,136.20 = 1,243.03 : x
  2. Step 2: Convert to fraction form
    1,428.32/2,136.20 = 1,243.03/x
  3. Step 3: Cross multiply
    1,428.32x = 2,136.20 × 1,243.03
  4. Step 4: Simplify right side
    1,428.32x = 2,655,349.13
  5. Step 5: Solve for x
    x = 2,655,349.13/1,428.32
  6. Step 6: Final answer
    x = 1,859.08

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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.