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Finding the Fourth Proportional to 493.81, 681.26 and 346.54

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Solution

The fourth proportional to 493.81, 681.26 and 346.54 is: 478.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.81 : 681.26 = 346.54 : x
  2. Step 2: Convert to fraction form
    493.81/681.26 = 346.54/x
  3. Step 3: Cross multiply
    493.81x = 681.26 × 346.54
  4. Step 4: Simplify right side
    493.81x = 236,084.66
  5. Step 5: Solve for x
    x = 236,084.66/493.81
  6. Step 6: Final answer
    x = 478.08

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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.