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Finding the Fourth Proportional to 620.69, 930.54 and 401.54

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Solution

The fourth proportional to 620.69, 930.54 and 401.54 is: 601.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.69 : 930.54 = 401.54 : x
  2. Step 2: Convert to fraction form
    620.69/930.54 = 401.54/x
  3. Step 3: Cross multiply
    620.69x = 930.54 × 401.54
  4. Step 4: Simplify right side
    620.69x = 373,649.03
  5. Step 5: Solve for x
    x = 373,649.03/620.69
  6. Step 6: Final answer
    x = 601.99

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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.