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Finding the Fourth Proportional to 555.17, 831.99 and 208.15

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Solution

The fourth proportional to 555.17, 831.99 and 208.15 is: 311.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.17 : 831.99 = 208.15 : x
  2. Step 2: Convert to fraction form
    555.17/831.99 = 208.15/x
  3. Step 3: Cross multiply
    555.17x = 831.99 × 208.15
  4. Step 4: Simplify right side
    555.17x = 173,180.93
  5. Step 5: Solve for x
    x = 173,180.93/555.17
  6. Step 6: Final answer
    x = 311.94

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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.