Home / 2,186.41-3,018.35-1,390.53

Finding the Fourth Proportional to 2,186.41, 3,018.35 and 1,390.53

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Solution

The fourth proportional to 2,186.41, 3,018.35 and 1,390.53 is: 1,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.41 : 3,018.35 = 1,390.53 : x
  2. Step 2: Convert to fraction form
    2,186.41/3,018.35 = 1,390.53/x
  3. Step 3: Cross multiply
    2,186.41x = 3,018.35 × 1,390.53
  4. Step 4: Simplify right side
    2,186.41x = 4,197,113.20
  5. Step 5: Solve for x
    x = 4,197,113.20/2,186.41
  6. Step 6: Final answer
    x = 1,919.64

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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.