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Finding the Fourth Proportional to 655.96, 899.36 and 644.26

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Solution

The fourth proportional to 655.96, 899.36 and 644.26 is: 883.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.96 : 899.36 = 644.26 : x
  2. Step 2: Convert to fraction form
    655.96/899.36 = 644.26/x
  3. Step 3: Cross multiply
    655.96x = 899.36 × 644.26
  4. Step 4: Simplify right side
    655.96x = 579,421.67
  5. Step 5: Solve for x
    x = 579,421.67/655.96
  6. Step 6: Final answer
    x = 883.32

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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.