Home / 3,761.40-5,643.18-1,128.98

Finding the Fourth Proportional to 3,761.40, 5,643.18 and 1,128.98

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Solution

The fourth proportional to 3,761.40, 5,643.18 and 1,128.98 is: 1,693.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.40 : 5,643.18 = 1,128.98 : x
  2. Step 2: Convert to fraction form
    3,761.40/5,643.18 = 1,128.98/x
  3. Step 3: Cross multiply
    3,761.40x = 5,643.18 × 1,128.98
  4. Step 4: Simplify right side
    3,761.40x = 6,371,037.36
  5. Step 5: Solve for x
    x = 6,371,037.36/3,761.40
  6. Step 6: Final answer
    x = 1,693.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.