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Finding the Fourth Proportional to 683.73, 942.23 and 486.90

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Solution

The fourth proportional to 683.73, 942.23 and 486.90 is: 670.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.73 : 942.23 = 486.90 : x
  2. Step 2: Convert to fraction form
    683.73/942.23 = 486.90/x
  3. Step 3: Cross multiply
    683.73x = 942.23 × 486.90
  4. Step 4: Simplify right side
    683.73x = 458,771.79
  5. Step 5: Solve for x
    x = 458,771.79/683.73
  6. Step 6: Final answer
    x = 670.98

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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.