Home / 3,128.88-4,318.81-1,803.46

Finding the Fourth Proportional to 3,128.88, 4,318.81 and 1,803.46

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Solution

The fourth proportional to 3,128.88, 4,318.81 and 1,803.46 is: 2,489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.88 : 4,318.81 = 1,803.46 : x
  2. Step 2: Convert to fraction form
    3,128.88/4,318.81 = 1,803.46/x
  3. Step 3: Cross multiply
    3,128.88x = 4,318.81 × 1,803.46
  4. Step 4: Simplify right side
    3,128.88x = 7,788,811.88
  5. Step 5: Solve for x
    x = 7,788,811.88/3,128.88
  6. Step 6: Final answer
    x = 2,489.33

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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.