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Finding the Fourth Proportional to 946.87, 1,419.44 and 485.21

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Solution

The fourth proportional to 946.87, 1,419.44 and 485.21 is: 727.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.87 : 1,419.44 = 485.21 : x
  2. Step 2: Convert to fraction form
    946.87/1,419.44 = 485.21/x
  3. Step 3: Cross multiply
    946.87x = 1,419.44 × 485.21
  4. Step 4: Simplify right side
    946.87x = 688,727.60
  5. Step 5: Solve for x
    x = 688,727.60/946.87
  6. Step 6: Final answer
    x = 727.37

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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.