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Finding the Fourth Proportional to 188.47, 278.86 and 187.93

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Solution

The fourth proportional to 188.47, 278.86 and 187.93 is: 278.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.47 : 278.86 = 187.93 : x
  2. Step 2: Convert to fraction form
    188.47/278.86 = 187.93/x
  3. Step 3: Cross multiply
    188.47x = 278.86 × 187.93
  4. Step 4: Simplify right side
    188.47x = 52,406.16
  5. Step 5: Solve for x
    x = 52,406.16/188.47
  6. Step 6: Final answer
    x = 278.06

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.