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Finding the Fourth Proportional to 682.81, 1,028.87 and 608.22

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Solution

The fourth proportional to 682.81, 1,028.87 and 608.22 is: 916.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.81 : 1,028.87 = 608.22 : x
  2. Step 2: Convert to fraction form
    682.81/1,028.87 = 608.22/x
  3. Step 3: Cross multiply
    682.81x = 1,028.87 × 608.22
  4. Step 4: Simplify right side
    682.81x = 625,779.31
  5. Step 5: Solve for x
    x = 625,779.31/682.81
  6. Step 6: Final answer
    x = 916.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.