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Finding the Fourth Proportional to 849.69, 1,172.27 and 554.85

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Solution

The fourth proportional to 849.69, 1,172.27 and 554.85 is: 765.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.69 : 1,172.27 = 554.85 : x
  2. Step 2: Convert to fraction form
    849.69/1,172.27 = 554.85/x
  3. Step 3: Cross multiply
    849.69x = 1,172.27 × 554.85
  4. Step 4: Simplify right side
    849.69x = 650,435.40
  5. Step 5: Solve for x
    x = 650,435.40/849.69
  6. Step 6: Final answer
    x = 765.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.