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Finding the Fourth Proportional to 554.69, 831.09 and 310.61

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Solution

The fourth proportional to 554.69, 831.09 and 310.61 is: 465.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.69 : 831.09 = 310.61 : x
  2. Step 2: Convert to fraction form
    554.69/831.09 = 310.61/x
  3. Step 3: Cross multiply
    554.69x = 831.09 × 310.61
  4. Step 4: Simplify right side
    554.69x = 258,144.86
  5. Step 5: Solve for x
    x = 258,144.86/554.69
  6. Step 6: Final answer
    x = 465.39

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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.