Home / 1,780.12-2,456.94-1,191.64

Finding the Fourth Proportional to 1,780.12, 2,456.94 and 1,191.64

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Solution

The fourth proportional to 1,780.12, 2,456.94 and 1,191.64 is: 1,644.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.12 : 2,456.94 = 1,191.64 : x
  2. Step 2: Convert to fraction form
    1,780.12/2,456.94 = 1,191.64/x
  3. Step 3: Cross multiply
    1,780.12x = 2,456.94 × 1,191.64
  4. Step 4: Simplify right side
    1,780.12x = 2,927,787.98
  5. Step 5: Solve for x
    x = 2,927,787.98/1,780.12
  6. Step 6: Final answer
    x = 1,644.71

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1.5x scale

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.