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Finding the Fourth Proportional to 1,090.85, 1,636.54 and 360.39

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Solution

The fourth proportional to 1,090.85, 1,636.54 and 360.39 is: 540.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.85 : 1,636.54 = 360.39 : x
  2. Step 2: Convert to fraction form
    1,090.85/1,636.54 = 360.39/x
  3. Step 3: Cross multiply
    1,090.85x = 1,636.54 × 360.39
  4. Step 4: Simplify right side
    1,090.85x = 589,792.65
  5. Step 5: Solve for x
    x = 589,792.65/1,090.85
  6. Step 6: Final answer
    x = 540.67

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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.