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Finding the Fourth Proportional to 965.74, 1,447.74 and 349.30

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Solution

The fourth proportional to 965.74, 1,447.74 and 349.30 is: 523.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.74 : 1,447.74 = 349.30 : x
  2. Step 2: Convert to fraction form
    965.74/1,447.74 = 349.30/x
  3. Step 3: Cross multiply
    965.74x = 1,447.74 × 349.30
  4. Step 4: Simplify right side
    965.74x = 505,695.58
  5. Step 5: Solve for x
    x = 505,695.58/965.74
  6. Step 6: Final answer
    x = 523.64

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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.