Home / 1,418.84-2,128.08-378.90

Finding the Fourth Proportional to 1,418.84, 2,128.08 and 378.90

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Solution

The fourth proportional to 1,418.84, 2,128.08 and 378.90 is: 568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.84 : 2,128.08 = 378.90 : x
  2. Step 2: Convert to fraction form
    1,418.84/2,128.08 = 378.90/x
  3. Step 3: Cross multiply
    1,418.84x = 2,128.08 × 378.90
  4. Step 4: Simplify right side
    1,418.84x = 806,329.51
  5. Step 5: Solve for x
    x = 806,329.51/1,418.84
  6. Step 6: Final answer
    x = 568.30

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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.