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Finding the Fourth Proportional to 847.95, 1,272.14 and 361.55

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Solution

The fourth proportional to 847.95, 1,272.14 and 361.55 is: 542.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.95 : 1,272.14 = 361.55 : x
  2. Step 2: Convert to fraction form
    847.95/1,272.14 = 361.55/x
  3. Step 3: Cross multiply
    847.95x = 1,272.14 × 361.55
  4. Step 4: Simplify right side
    847.95x = 459,934.05
  5. Step 5: Solve for x
    x = 459,934.05/847.95
  6. Step 6: Final answer
    x = 542.41

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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.