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Finding the Fourth Proportional to 553.86, 830.86 and 188.56

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Solution

The fourth proportional to 553.86, 830.86 and 188.56 is: 282.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.86 : 830.86 = 188.56 : x
  2. Step 2: Convert to fraction form
    553.86/830.86 = 188.56/x
  3. Step 3: Cross multiply
    553.86x = 830.86 × 188.56
  4. Step 4: Simplify right side
    553.86x = 156,666.96
  5. Step 5: Solve for x
    x = 156,666.96/553.86
  6. Step 6: Final answer
    x = 282.86

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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.