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Finding the Fourth Proportional to 682.79, 942.02 and 383.98

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Solution

The fourth proportional to 682.79, 942.02 and 383.98 is: 529.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.79 : 942.02 = 383.98 : x
  2. Step 2: Convert to fraction form
    682.79/942.02 = 383.98/x
  3. Step 3: Cross multiply
    682.79x = 942.02 × 383.98
  4. Step 4: Simplify right side
    682.79x = 361,713.91
  5. Step 5: Solve for x
    x = 361,713.91/682.79
  6. Step 6: Final answer
    x = 529.76

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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.