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Finding the Fourth Proportional to 696.74, 961.47 and 448.07

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Solution

The fourth proportional to 696.74, 961.47 and 448.07 is: 618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.74 : 961.47 = 448.07 : x
  2. Step 2: Convert to fraction form
    696.74/961.47 = 448.07/x
  3. Step 3: Cross multiply
    696.74x = 961.47 × 448.07
  4. Step 4: Simplify right side
    696.74x = 430,801.06
  5. Step 5: Solve for x
    x = 430,801.06/696.74
  6. Step 6: Final answer
    x = 618.31

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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.