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Finding the Fourth Proportional to 693.70, 957.97 and 628.09

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Solution

The fourth proportional to 693.70, 957.97 and 628.09 is: 867.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.70 : 957.97 = 628.09 : x
  2. Step 2: Convert to fraction form
    693.70/957.97 = 628.09/x
  3. Step 3: Cross multiply
    693.70x = 957.97 × 628.09
  4. Step 4: Simplify right side
    693.70x = 601,691.38
  5. Step 5: Solve for x
    x = 601,691.38/693.70
  6. Step 6: Final answer
    x = 867.37

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1.5x scale

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.