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Finding the Fourth Proportional to 849.45, 1,272.55 and 574.19

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Solution

The fourth proportional to 849.45, 1,272.55 and 574.19 is: 860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.45 : 1,272.55 = 574.19 : x
  2. Step 2: Convert to fraction form
    849.45/1,272.55 = 574.19/x
  3. Step 3: Cross multiply
    849.45x = 1,272.55 × 574.19
  4. Step 4: Simplify right side
    849.45x = 730,685.48
  5. Step 5: Solve for x
    x = 730,685.48/849.45
  6. Step 6: Final answer
    x = 860.19

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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.