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Finding the Fourth Proportional to 554.28, 831.74 and 307.69

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Solution

The fourth proportional to 554.28, 831.74 and 307.69 is: 461.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.28 : 831.74 = 307.69 : x
  2. Step 2: Convert to fraction form
    554.28/831.74 = 307.69/x
  3. Step 3: Cross multiply
    554.28x = 831.74 × 307.69
  4. Step 4: Simplify right side
    554.28x = 255,915.33
  5. Step 5: Solve for x
    x = 255,915.33/554.28
  6. Step 6: Final answer
    x = 461.71

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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.