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Finding the Fourth Proportional to 695.25, 1,042.83 and 208.35

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Solution

The fourth proportional to 695.25, 1,042.83 and 208.35 is: 312.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.25 : 1,042.83 = 208.35 : x
  2. Step 2: Convert to fraction form
    695.25/1,042.83 = 208.35/x
  3. Step 3: Cross multiply
    695.25x = 1,042.83 × 208.35
  4. Step 4: Simplify right side
    695.25x = 217,273.63
  5. Step 5: Solve for x
    x = 217,273.63/695.25
  6. Step 6: Final answer
    x = 312.51

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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.