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Finding the Fourth Proportional to 626.99, 940.47 and 280.23

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Solution

The fourth proportional to 626.99, 940.47 and 280.23 is: 420.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.99 : 940.47 = 280.23 : x
  2. Step 2: Convert to fraction form
    626.99/940.47 = 280.23/x
  3. Step 3: Cross multiply
    626.99x = 940.47 × 280.23
  4. Step 4: Simplify right side
    626.99x = 263,547.91
  5. Step 5: Solve for x
    x = 263,547.91/626.99
  6. Step 6: Final answer
    x = 420.34

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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.