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Finding the Fourth Proportional to 682.76, 942.42 and 403.16

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Solution

The fourth proportional to 682.76, 942.42 and 403.16 is: 556.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.76 : 942.42 = 403.16 : x
  2. Step 2: Convert to fraction form
    682.76/942.42 = 403.16/x
  3. Step 3: Cross multiply
    682.76x = 942.42 × 403.16
  4. Step 4: Simplify right side
    682.76x = 379,946.05
  5. Step 5: Solve for x
    x = 379,946.05/682.76
  6. Step 6: Final answer
    x = 556.49

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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.