Home / 1,393.11-2,090.67-1,122.47

Finding the Fourth Proportional to 1,393.11, 2,090.67 and 1,122.47

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Solution

The fourth proportional to 1,393.11, 2,090.67 and 1,122.47 is: 1,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.11 : 2,090.67 = 1,122.47 : x
  2. Step 2: Convert to fraction form
    1,393.11/2,090.67 = 1,122.47/x
  3. Step 3: Cross multiply
    1,393.11x = 2,090.67 × 1,122.47
  4. Step 4: Simplify right side
    1,393.11x = 2,346,714.35
  5. Step 5: Solve for x
    x = 2,346,714.35/1,393.11
  6. Step 6: Final answer
    x = 1,684.51

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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.