Home / 1,431.91-1,975.30-1,181.78

Finding the Fourth Proportional to 1,431.91, 1,975.30 and 1,181.78

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Solution

The fourth proportional to 1,431.91, 1,975.30 and 1,181.78 is: 1,630.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.91 : 1,975.30 = 1,181.78 : x
  2. Step 2: Convert to fraction form
    1,431.91/1,975.30 = 1,181.78/x
  3. Step 3: Cross multiply
    1,431.91x = 1,975.30 × 1,181.78
  4. Step 4: Simplify right side
    1,431.91x = 2,334,357.20
  5. Step 5: Solve for x
    x = 2,334,357.20/1,431.91
  6. Step 6: Final answer
    x = 1,630.24

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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.