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Finding the Fourth Proportional to 964.99, 1,447.72 and 271.65

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Solution

The fourth proportional to 964.99, 1,447.72 and 271.65 is: 407.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.99 : 1,447.72 = 271.65 : x
  2. Step 2: Convert to fraction form
    964.99/1,447.72 = 271.65/x
  3. Step 3: Cross multiply
    964.99x = 1,447.72 × 271.65
  4. Step 4: Simplify right side
    964.99x = 393,273.14
  5. Step 5: Solve for x
    x = 393,273.14/964.99
  6. Step 6: Final answer
    x = 407.54

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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.