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Finding the Fourth Proportional to 1,106.85, 1,659.42 and 717.24

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Solution

The fourth proportional to 1,106.85, 1,659.42 and 717.24 is: 1,075.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.85 : 1,659.42 = 717.24 : x
  2. Step 2: Convert to fraction form
    1,106.85/1,659.42 = 717.24/x
  3. Step 3: Cross multiply
    1,106.85x = 1,659.42 × 717.24
  4. Step 4: Simplify right side
    1,106.85x = 1,190,202.40
  5. Step 5: Solve for x
    x = 1,190,202.40/1,106.85
  6. Step 6: Final answer
    x = 1,075.31

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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.