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Finding the Fourth Proportional to 554.56, 831.68 and 189.28

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Solution

The fourth proportional to 554.56, 831.68 and 189.28 is: 283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.56 : 831.68 = 189.28 : x
  2. Step 2: Convert to fraction form
    554.56/831.68 = 189.28/x
  3. Step 3: Cross multiply
    554.56x = 831.68 × 189.28
  4. Step 4: Simplify right side
    554.56x = 157,420.39
  5. Step 5: Solve for x
    x = 157,420.39/554.56
  6. Step 6: Final answer
    x = 283.87

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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.