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Finding the Fourth Proportional to 946.26, 1,419.19 and 287.99

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Solution

The fourth proportional to 946.26, 1,419.19 and 287.99 is: 431.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.26 : 1,419.19 = 287.99 : x
  2. Step 2: Convert to fraction form
    946.26/1,419.19 = 287.99/x
  3. Step 3: Cross multiply
    946.26x = 1,419.19 × 287.99
  4. Step 4: Simplify right side
    946.26x = 408,710.03
  5. Step 5: Solve for x
    x = 408,710.03/946.26
  6. Step 6: Final answer
    x = 431.92

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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.