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Finding the Fourth Proportional to 511.05, 705.23 and 278.17

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Solution

The fourth proportional to 511.05, 705.23 and 278.17 is: 383.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.05 : 705.23 = 278.17 : x
  2. Step 2: Convert to fraction form
    511.05/705.23 = 278.17/x
  3. Step 3: Cross multiply
    511.05x = 705.23 × 278.17
  4. Step 4: Simplify right side
    511.05x = 196,173.83
  5. Step 5: Solve for x
    x = 196,173.83/511.05
  6. Step 6: Final answer
    x = 383.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.