Home / 1,428.78-2,138.31-1,062.66

Finding the Fourth Proportional to 1,428.78, 2,138.31 and 1,062.66

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Solution

The fourth proportional to 1,428.78, 2,138.31 and 1,062.66 is: 1,590.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.78 : 2,138.31 = 1,062.66 : x
  2. Step 2: Convert to fraction form
    1,428.78/2,138.31 = 1,062.66/x
  3. Step 3: Cross multiply
    1,428.78x = 2,138.31 × 1,062.66
  4. Step 4: Simplify right side
    1,428.78x = 2,272,296.50
  5. Step 5: Solve for x
    x = 2,272,296.50/1,428.78
  6. Step 6: Final answer
    x = 1,590.38

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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.