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Finding the Fourth Proportional to 1,028.09, 1,418.68 and 579.99

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Solution

The fourth proportional to 1,028.09, 1,418.68 and 579.99 is: 800.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.09 : 1,418.68 = 579.99 : x
  2. Step 2: Convert to fraction form
    1,028.09/1,418.68 = 579.99/x
  3. Step 3: Cross multiply
    1,028.09x = 1,418.68 × 579.99
  4. Step 4: Simplify right side
    1,028.09x = 822,817.31
  5. Step 5: Solve for x
    x = 822,817.31/1,028.09
  6. Step 6: Final answer
    x = 800.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.