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Finding the Fourth Proportional to 889.26, 1,333.62 and 312

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Solution

The fourth proportional to 889.26, 1,333.62 and 312 is: 467.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.26 : 1,333.62 = 312 : x
  2. Step 2: Convert to fraction form
    889.26/1,333.62 = 312/x
  3. Step 3: Cross multiply
    889.26x = 1,333.62 × 312
  4. Step 4: Simplify right side
    889.26x = 416,089.44
  5. Step 5: Solve for x
    x = 416,089.44/889.26
  6. Step 6: Final answer
    x = 467.91

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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.