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Finding the Fourth Proportional to 751.56, 1,127.43 and 251.05

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Solution

The fourth proportional to 751.56, 1,127.43 and 251.05 is: 376.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.56 : 1,127.43 = 251.05 : x
  2. Step 2: Convert to fraction form
    751.56/1,127.43 = 251.05/x
  3. Step 3: Cross multiply
    751.56x = 1,127.43 × 251.05
  4. Step 4: Simplify right side
    751.56x = 283,039.89
  5. Step 5: Solve for x
    x = 283,039.89/751.56
  6. Step 6: Final answer
    x = 376.60

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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.