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Finding the Fourth Proportional to 1,228.08, 1,696.08 and 836.16

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Solution

The fourth proportional to 1,228.08, 1,696.08 and 836.16 is: 1,154.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.08 : 1,696.08 = 836.16 : x
  2. Step 2: Convert to fraction form
    1,228.08/1,696.08 = 836.16/x
  3. Step 3: Cross multiply
    1,228.08x = 1,696.08 × 836.16
  4. Step 4: Simplify right side
    1,228.08x = 1,418,194.25
  5. Step 5: Solve for x
    x = 1,418,194.25/1,228.08
  6. Step 6: Final answer
    x = 1,154.81

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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.