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Finding the Fourth Proportional to 554.33, 831.49 and 143.43

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Solution

The fourth proportional to 554.33, 831.49 and 143.43 is: 215.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.33 : 831.49 = 143.43 : x
  2. Step 2: Convert to fraction form
    554.33/831.49 = 143.43/x
  3. Step 3: Cross multiply
    554.33x = 831.49 × 143.43
  4. Step 4: Simplify right side
    554.33x = 119,258.42
  5. Step 5: Solve for x
    x = 119,258.42/554.33
  6. Step 6: Final answer
    x = 215.14

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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.