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Finding the Fourth Proportional to 847.66, 1,270.98 and 299.74

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Solution

The fourth proportional to 847.66, 1,270.98 and 299.74 is: 449.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.66 : 1,270.98 = 299.74 : x
  2. Step 2: Convert to fraction form
    847.66/1,270.98 = 299.74/x
  3. Step 3: Cross multiply
    847.66x = 1,270.98 × 299.74
  4. Step 4: Simplify right side
    847.66x = 380,963.55
  5. Step 5: Solve for x
    x = 380,963.55/847.66
  6. Step 6: Final answer
    x = 449.43

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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.