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Finding the Fourth Proportional to 751.89, 1,127.90 and 361.99

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Solution

The fourth proportional to 751.89, 1,127.90 and 361.99 is: 543.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.89 : 1,127.90 = 361.99 : x
  2. Step 2: Convert to fraction form
    751.89/1,127.90 = 361.99/x
  3. Step 3: Cross multiply
    751.89x = 1,127.90 × 361.99
  4. Step 4: Simplify right side
    751.89x = 408,288.52
  5. Step 5: Solve for x
    x = 408,288.52/751.89
  6. Step 6: Final answer
    x = 543.02

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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.