Home / 1,418.36-2,127.64-378.35

Finding the Fourth Proportional to 1,418.36, 2,127.64 and 378.35

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Solution

The fourth proportional to 1,418.36, 2,127.64 and 378.35 is: 567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.36 : 2,127.64 = 378.35 : x
  2. Step 2: Convert to fraction form
    1,418.36/2,127.64 = 378.35/x
  3. Step 3: Cross multiply
    1,418.36x = 2,127.64 × 378.35
  4. Step 4: Simplify right side
    1,418.36x = 804,990.70
  5. Step 5: Solve for x
    x = 804,990.70/1,418.36
  6. Step 6: Final answer
    x = 567.55

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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.