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Finding the Fourth Proportional to 848.78, 1,273.30 and 300.92

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Solution

The fourth proportional to 848.78, 1,273.30 and 300.92 is: 451.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.78 : 1,273.30 = 300.92 : x
  2. Step 2: Convert to fraction form
    848.78/1,273.30 = 300.92/x
  3. Step 3: Cross multiply
    848.78x = 1,273.30 × 300.92
  4. Step 4: Simplify right side
    848.78x = 383,163.17
  5. Step 5: Solve for x
    x = 383,163.17/848.78
  6. Step 6: Final answer
    x = 451.43

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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.