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Finding the Fourth Proportional to 847.91, 1,271.87 and 300.12

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Solution

The fourth proportional to 847.91, 1,271.87 and 300.12 is: 450.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.91 : 1,271.87 = 300.12 : x
  2. Step 2: Convert to fraction form
    847.91/1,271.87 = 300.12/x
  3. Step 3: Cross multiply
    847.91x = 1,271.87 × 300.12
  4. Step 4: Simplify right side
    847.91x = 381,712.12
  5. Step 5: Solve for x
    x = 381,712.12/847.91
  6. Step 6: Final answer
    x = 450.18

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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.