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Finding the Fourth Proportional to 494.54, 681.62 and 383.81

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Solution

The fourth proportional to 494.54, 681.62 and 383.81 is: 529.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.54 : 681.62 = 383.81 : x
  2. Step 2: Convert to fraction form
    494.54/681.62 = 383.81/x
  3. Step 3: Cross multiply
    494.54x = 681.62 × 383.81
  4. Step 4: Simplify right side
    494.54x = 261,611.83
  5. Step 5: Solve for x
    x = 261,611.83/494.54
  6. Step 6: Final answer
    x = 529.00

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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.