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Finding the Fourth Proportional to 964.77, 1,447.11 and 671.42

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Solution

The fourth proportional to 964.77, 1,447.11 and 671.42 is: 1,007.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.77 : 1,447.11 = 671.42 : x
  2. Step 2: Convert to fraction form
    964.77/1,447.11 = 671.42/x
  3. Step 3: Cross multiply
    964.77x = 1,447.11 × 671.42
  4. Step 4: Simplify right side
    964.77x = 971,611.36
  5. Step 5: Solve for x
    x = 971,611.36/964.77
  6. Step 6: Final answer
    x = 1,007.09

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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.