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Finding the Fourth Proportional to 751.61, 1,127.72 and 605.21

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Solution

The fourth proportional to 751.61, 1,127.72 and 605.21 is: 908.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.61 : 1,127.72 = 605.21 : x
  2. Step 2: Convert to fraction form
    751.61/1,127.72 = 605.21/x
  3. Step 3: Cross multiply
    751.61x = 1,127.72 × 605.21
  4. Step 4: Simplify right side
    751.61x = 682,503.30
  5. Step 5: Solve for x
    x = 682,503.30/751.61
  6. Step 6: Final answer
    x = 908.05

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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.