Home / 1,427.92-1,966.59-1,231.36

Finding the Fourth Proportional to 1,427.92, 1,966.59 and 1,231.36

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Solution

The fourth proportional to 1,427.92, 1,966.59 and 1,231.36 is: 1,695.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.92 : 1,966.59 = 1,231.36 : x
  2. Step 2: Convert to fraction form
    1,427.92/1,966.59 = 1,231.36/x
  3. Step 3: Cross multiply
    1,427.92x = 1,966.59 × 1,231.36
  4. Step 4: Simplify right side
    1,427.92x = 2,421,580.26
  5. Step 5: Solve for x
    x = 2,421,580.26/1,427.92
  6. Step 6: Final answer
    x = 1,695.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.