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Finding the Fourth Proportional to 772.55, 1,159.60 and 361.99

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Solution

The fourth proportional to 772.55, 1,159.60 and 361.99 is: 543.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.55 : 1,159.60 = 361.99 : x
  2. Step 2: Convert to fraction form
    772.55/1,159.60 = 361.99/x
  3. Step 3: Cross multiply
    772.55x = 1,159.60 × 361.99
  4. Step 4: Simplify right side
    772.55x = 419,759.32
  5. Step 5: Solve for x
    x = 419,759.32/772.55
  6. Step 6: Final answer
    x = 543.34

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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.