Home / 1,388.24-2,082.32-414.36

Finding the Fourth Proportional to 1,388.24, 2,082.32 and 414.36

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Solution

The fourth proportional to 1,388.24, 2,082.32 and 414.36 is: 621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.24 : 2,082.32 = 414.36 : x
  2. Step 2: Convert to fraction form
    1,388.24/2,082.32 = 414.36/x
  3. Step 3: Cross multiply
    1,388.24x = 2,082.32 × 414.36
  4. Step 4: Simplify right side
    1,388.24x = 862,830.12
  5. Step 5: Solve for x
    x = 862,830.12/1,388.24
  6. Step 6: Final answer
    x = 621.53

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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.