Home / 1,861.80-2,569.75-1,076.30

Finding the Fourth Proportional to 1,861.80, 2,569.75 and 1,076.30

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Solution

The fourth proportional to 1,861.80, 2,569.75 and 1,076.30 is: 1,485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.80 : 2,569.75 = 1,076.30 : x
  2. Step 2: Convert to fraction form
    1,861.80/2,569.75 = 1,076.30/x
  3. Step 3: Cross multiply
    1,861.80x = 2,569.75 × 1,076.30
  4. Step 4: Simplify right side
    1,861.80x = 2,765,821.93
  5. Step 5: Solve for x
    x = 2,765,821.93/1,861.80
  6. Step 6: Final answer
    x = 1,485.56

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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.