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Finding the Fourth Proportional to 491.93, 679 and 282.22

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Solution

The fourth proportional to 491.93, 679 and 282.22 is: 389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.93 : 679 = 282.22 : x
  2. Step 2: Convert to fraction form
    491.93/679 = 282.22/x
  3. Step 3: Cross multiply
    491.93x = 679 × 282.22
  4. Step 4: Simplify right side
    491.93x = 191,627.38
  5. Step 5: Solve for x
    x = 191,627.38/491.93
  6. Step 6: Final answer
    x = 389.54

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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.