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Finding the Fourth Proportional to 965.42, 1,447.99 and 316.18

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Solution

The fourth proportional to 965.42, 1,447.99 and 316.18 is: 474.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.42 : 1,447.99 = 316.18 : x
  2. Step 2: Convert to fraction form
    965.42/1,447.99 = 316.18/x
  3. Step 3: Cross multiply
    965.42x = 1,447.99 × 316.18
  4. Step 4: Simplify right side
    965.42x = 457,825.48
  5. Step 5: Solve for x
    x = 457,825.48/965.42
  6. Step 6: Final answer
    x = 474.22

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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.