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Finding the Fourth Proportional to 683.36, 942.56 and 517.60

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Solution

The fourth proportional to 683.36, 942.56 and 517.60 is: 713.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.36 : 942.56 = 517.60 : x
  2. Step 2: Convert to fraction form
    683.36/942.56 = 517.60/x
  3. Step 3: Cross multiply
    683.36x = 942.56 × 517.60
  4. Step 4: Simplify right side
    683.36x = 487,869.06
  5. Step 5: Solve for x
    x = 487,869.06/683.36
  6. Step 6: Final answer
    x = 713.93

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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.