Home / 1,393.95-2,090.70-1,161.20

Finding the Fourth Proportional to 1,393.95, 2,090.70 and 1,161.20

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Solution

The fourth proportional to 1,393.95, 2,090.70 and 1,161.20 is: 1,741.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.95 : 2,090.70 = 1,161.20 : x
  2. Step 2: Convert to fraction form
    1,393.95/2,090.70 = 1,161.20/x
  3. Step 3: Cross multiply
    1,393.95x = 2,090.70 × 1,161.20
  4. Step 4: Simplify right side
    1,393.95x = 2,427,710.39
  5. Step 5: Solve for x
    x = 2,427,710.39/1,393.95
  6. Step 6: Final answer
    x = 1,741.61

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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.