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Finding the Fourth Proportional to 655.36, 898.91 and 620.13

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Solution

The fourth proportional to 655.36, 898.91 and 620.13 is: 850.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.36 : 898.91 = 620.13 : x
  2. Step 2: Convert to fraction form
    655.36/898.91 = 620.13/x
  3. Step 3: Cross multiply
    655.36x = 898.91 × 620.13
  4. Step 4: Simplify right side
    655.36x = 557,435.01
  5. Step 5: Solve for x
    x = 557,435.01/655.36
  6. Step 6: Final answer
    x = 850.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.