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Finding the Fourth Proportional to 1,028.57, 1,419.44 and 608.91

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Solution

The fourth proportional to 1,028.57, 1,419.44 and 608.91 is: 840.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.57 : 1,419.44 = 608.91 : x
  2. Step 2: Convert to fraction form
    1,028.57/1,419.44 = 608.91/x
  3. Step 3: Cross multiply
    1,028.57x = 1,419.44 × 608.91
  4. Step 4: Simplify right side
    1,028.57x = 864,310.26
  5. Step 5: Solve for x
    x = 864,310.26/1,028.57
  6. Step 6: Final answer
    x = 840.31

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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.