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Finding the Fourth Proportional to 848.20, 1,271.86 and 300.30

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Solution

The fourth proportional to 848.20, 1,271.86 and 300.30 is: 450.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.20 : 1,271.86 = 300.30 : x
  2. Step 2: Convert to fraction form
    848.20/1,271.86 = 300.30/x
  3. Step 3: Cross multiply
    848.20x = 1,271.86 × 300.30
  4. Step 4: Simplify right side
    848.20x = 381,939.56
  5. Step 5: Solve for x
    x = 381,939.56/848.20
  6. Step 6: Final answer
    x = 450.29

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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.