Home / 1,428.90-2,143.35-1,374.23

Finding the Fourth Proportional to 1,428.90, 2,143.35 and 1,374.23

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Solution

The fourth proportional to 1,428.90, 2,143.35 and 1,374.23 is: 2,061.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.90 : 2,143.35 = 1,374.23 : x
  2. Step 2: Convert to fraction form
    1,428.90/2,143.35 = 1,374.23/x
  3. Step 3: Cross multiply
    1,428.90x = 2,143.35 × 1,374.23
  4. Step 4: Simplify right side
    1,428.90x = 2,945,455.87
  5. Step 5: Solve for x
    x = 2,945,455.87/1,428.90
  6. Step 6: Final answer
    x = 2,061.35

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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.