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Finding the Fourth Proportional to 965.41, 1,447.90 and 417.85

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Solution

The fourth proportional to 965.41, 1,447.90 and 417.85 is: 626.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.41 : 1,447.90 = 417.85 : x
  2. Step 2: Convert to fraction form
    965.41/1,447.90 = 417.85/x
  3. Step 3: Cross multiply
    965.41x = 1,447.90 × 417.85
  4. Step 4: Simplify right side
    965.41x = 605,005.02
  5. Step 5: Solve for x
    x = 605,005.02/965.41
  6. Step 6: Final answer
    x = 626.68

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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.