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Finding the Fourth Proportional to 554.61, 831.78 and 189.39

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Solution

The fourth proportional to 554.61, 831.78 and 189.39 is: 284.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.61 : 831.78 = 189.39 : x
  2. Step 2: Convert to fraction form
    554.61/831.78 = 189.39/x
  3. Step 3: Cross multiply
    554.61x = 831.78 × 189.39
  4. Step 4: Simplify right side
    554.61x = 157,530.81
  5. Step 5: Solve for x
    x = 157,530.81/554.61
  6. Step 6: Final answer
    x = 284.04

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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.