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Finding the Fourth Proportional to 555.44, 833.11 and 208.78

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Solution

The fourth proportional to 555.44, 833.11 and 208.78 is: 313.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.44 : 833.11 = 208.78 : x
  2. Step 2: Convert to fraction form
    555.44/833.11 = 208.78/x
  3. Step 3: Cross multiply
    555.44x = 833.11 × 208.78
  4. Step 4: Simplify right side
    555.44x = 173,934.10
  5. Step 5: Solve for x
    x = 173,934.10/555.44
  6. Step 6: Final answer
    x = 313.15

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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.