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Finding the Fourth Proportional to 282.08, 388.88 and 188.68

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Solution

The fourth proportional to 282.08, 388.88 and 188.68 is: 260.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.08 : 388.88 = 188.68 : x
  2. Step 2: Convert to fraction form
    282.08/388.88 = 188.68/x
  3. Step 3: Cross multiply
    282.08x = 388.88 × 188.68
  4. Step 4: Simplify right side
    282.08x = 73,373.88
  5. Step 5: Solve for x
    x = 73,373.88/282.08
  6. Step 6: Final answer
    x = 260.12

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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.