Home / 1,999.70-2,760.45-1,292.30

Finding the Fourth Proportional to 1,999.70, 2,760.45 and 1,292.30

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Solution

The fourth proportional to 1,999.70, 2,760.45 and 1,292.30 is: 1,783.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.70 : 2,760.45 = 1,292.30 : x
  2. Step 2: Convert to fraction form
    1,999.70/2,760.45 = 1,292.30/x
  3. Step 3: Cross multiply
    1,999.70x = 2,760.45 × 1,292.30
  4. Step 4: Simplify right side
    1,999.70x = 3,567,329.54
  5. Step 5: Solve for x
    x = 3,567,329.54/1,999.70
  6. Step 6: Final answer
    x = 1,783.93

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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.