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Finding the Fourth Proportional to 1,186.19, 1,636.96 and 662.22

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Solution

The fourth proportional to 1,186.19, 1,636.96 and 662.22 is: 913.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.19 : 1,636.96 = 662.22 : x
  2. Step 2: Convert to fraction form
    1,186.19/1,636.96 = 662.22/x
  3. Step 3: Cross multiply
    1,186.19x = 1,636.96 × 662.22
  4. Step 4: Simplify right side
    1,186.19x = 1,084,027.65
  5. Step 5: Solve for x
    x = 1,084,027.65/1,186.19
  6. Step 6: Final answer
    x = 913.87

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1.5x scale

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.