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Finding the Fourth Proportional to 1,091.09, 1,636.40 and 360.49

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Solution

The fourth proportional to 1,091.09, 1,636.40 and 360.49 is: 540.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.09 : 1,636.40 = 360.49 : x
  2. Step 2: Convert to fraction form
    1,091.09/1,636.40 = 360.49/x
  3. Step 3: Cross multiply
    1,091.09x = 1,636.40 × 360.49
  4. Step 4: Simplify right side
    1,091.09x = 589,905.84
  5. Step 5: Solve for x
    x = 589,905.84/1,091.09
  6. Step 6: Final answer
    x = 540.66

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1.5x scale

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.