Home / 1,395.18-2,092.38-421.14

Finding the Fourth Proportional to 1,395.18, 2,092.38 and 421.14

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Solution

The fourth proportional to 1,395.18, 2,092.38 and 421.14 is: 631.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.18 : 2,092.38 = 421.14 : x
  2. Step 2: Convert to fraction form
    1,395.18/2,092.38 = 421.14/x
  3. Step 3: Cross multiply
    1,395.18x = 2,092.38 × 421.14
  4. Step 4: Simplify right side
    1,395.18x = 881,184.91
  5. Step 5: Solve for x
    x = 881,184.91/1,395.18
  6. Step 6: Final answer
    x = 631.59

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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.