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Finding the Fourth Proportional to 324.41, 485.70 and 291.60

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Solution

The fourth proportional to 324.41, 485.70 and 291.60 is: 436.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.41 : 485.70 = 291.60 : x
  2. Step 2: Convert to fraction form
    324.41/485.70 = 291.60/x
  3. Step 3: Cross multiply
    324.41x = 485.70 × 291.60
  4. Step 4: Simplify right side
    324.41x = 141,629.03
  5. Step 5: Solve for x
    x = 141,629.03/324.41
  6. Step 6: Final answer
    x = 436.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.