Home / 1,863.80-2,571.20-1,155.45

Finding the Fourth Proportional to 1,863.80, 2,571.20 and 1,155.45

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Solution

The fourth proportional to 1,863.80, 2,571.20 and 1,155.45 is: 1,594.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.80 : 2,571.20 = 1,155.45 : x
  2. Step 2: Convert to fraction form
    1,863.80/2,571.20 = 1,155.45/x
  3. Step 3: Cross multiply
    1,863.80x = 2,571.20 × 1,155.45
  4. Step 4: Simplify right side
    1,863.80x = 2,970,893.69
  5. Step 5: Solve for x
    x = 2,970,893.69/1,863.80
  6. Step 6: Final answer
    x = 1,594.00

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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.