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Finding the Fourth Proportional to 555.50, 833.09 and 208.58

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Solution

The fourth proportional to 555.50, 833.09 and 208.58 is: 312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.50 : 833.09 = 208.58 : x
  2. Step 2: Convert to fraction form
    555.50/833.09 = 208.58/x
  3. Step 3: Cross multiply
    555.50x = 833.09 × 208.58
  4. Step 4: Simplify right side
    555.50x = 173,760.70
  5. Step 5: Solve for x
    x = 173,760.70/555.50
  6. Step 6: Final answer
    x = 312.80

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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.