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Finding the Fourth Proportional to 1,114.85, 1,538.48 and 617.48

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Solution

The fourth proportional to 1,114.85, 1,538.48 and 617.48 is: 852.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.85 : 1,538.48 = 617.48 : x
  2. Step 2: Convert to fraction form
    1,114.85/1,538.48 = 617.48/x
  3. Step 3: Cross multiply
    1,114.85x = 1,538.48 × 617.48
  4. Step 4: Simplify right side
    1,114.85x = 949,969.85
  5. Step 5: Solve for x
    x = 949,969.85/1,114.85
  6. Step 6: Final answer
    x = 852.11

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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.