Home / 1,780.32-2,456.94-1,181.76

Finding the Fourth Proportional to 1,780.32, 2,456.94 and 1,181.76

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Solution

The fourth proportional to 1,780.32, 2,456.94 and 1,181.76 is: 1,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.32 : 2,456.94 = 1,181.76 : x
  2. Step 2: Convert to fraction form
    1,780.32/2,456.94 = 1,181.76/x
  3. Step 3: Cross multiply
    1,780.32x = 2,456.94 × 1,181.76
  4. Step 4: Simplify right side
    1,780.32x = 2,903,513.41
  5. Step 5: Solve for x
    x = 2,903,513.41/1,780.32
  6. Step 6: Final answer
    x = 1,630.89

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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.