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Finding the Fourth Proportional to 554.36, 831.39 and 207.68

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Solution

The fourth proportional to 554.36, 831.39 and 207.68 is: 311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.36 : 831.39 = 207.68 : x
  2. Step 2: Convert to fraction form
    554.36/831.39 = 207.68/x
  3. Step 3: Cross multiply
    554.36x = 831.39 × 207.68
  4. Step 4: Simplify right side
    554.36x = 172,658.92
  5. Step 5: Solve for x
    x = 172,658.92/554.36
  6. Step 6: Final answer
    x = 311.46

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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.