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Finding the Fourth Proportional to 696.90, 1,049.44 and 606.68

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Solution

The fourth proportional to 696.90, 1,049.44 and 606.68 is: 913.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.90 : 1,049.44 = 606.68 : x
  2. Step 2: Convert to fraction form
    696.90/1,049.44 = 606.68/x
  3. Step 3: Cross multiply
    696.90x = 1,049.44 × 606.68
  4. Step 4: Simplify right side
    696.90x = 636,674.26
  5. Step 5: Solve for x
    x = 636,674.26/696.90
  6. Step 6: Final answer
    x = 913.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.