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Finding the Fourth Proportional to 682.40, 1,024.01 and 657.29

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Solution

The fourth proportional to 682.40, 1,024.01 and 657.29 is: 986.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.40 : 1,024.01 = 657.29 : x
  2. Step 2: Convert to fraction form
    682.40/1,024.01 = 657.29/x
  3. Step 3: Cross multiply
    682.40x = 1,024.01 × 657.29
  4. Step 4: Simplify right side
    682.40x = 673,071.53
  5. Step 5: Solve for x
    x = 673,071.53/682.40
  6. Step 6: Final answer
    x = 986.33

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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.