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Finding the Fourth Proportional to 1,170.85, 1,756.35 and 349.05

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Solution

The fourth proportional to 1,170.85, 1,756.35 and 349.05 is: 523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.85 : 1,756.35 = 349.05 : x
  2. Step 2: Convert to fraction form
    1,170.85/1,756.35 = 349.05/x
  3. Step 3: Cross multiply
    1,170.85x = 1,756.35 × 349.05
  4. Step 4: Simplify right side
    1,170.85x = 613,053.97
  5. Step 5: Solve for x
    x = 613,053.97/1,170.85
  6. Step 6: Final answer
    x = 523.60

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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.