Home / 1,395.15-2,092.66-421.22

Finding the Fourth Proportional to 1,395.15, 2,092.66 and 421.22

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Solution

The fourth proportional to 1,395.15, 2,092.66 and 421.22 is: 631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.15 : 2,092.66 = 421.22 : x
  2. Step 2: Convert to fraction form
    1,395.15/2,092.66 = 421.22/x
  3. Step 3: Cross multiply
    1,395.15x = 2,092.66 × 421.22
  4. Step 4: Simplify right side
    1,395.15x = 881,467.37
  5. Step 5: Solve for x
    x = 881,467.37/1,395.15
  6. Step 6: Final answer
    x = 631.81

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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.