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Finding the Fourth Proportional to 696.74, 1,045.26 and 209.84

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Solution

The fourth proportional to 696.74, 1,045.26 and 209.84 is: 314.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.74 : 1,045.26 = 209.84 : x
  2. Step 2: Convert to fraction form
    696.74/1,045.26 = 209.84/x
  3. Step 3: Cross multiply
    696.74x = 1,045.26 × 209.84
  4. Step 4: Simplify right side
    696.74x = 219,337.36
  5. Step 5: Solve for x
    x = 219,337.36/696.74
  6. Step 6: Final answer
    x = 314.81

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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.