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Finding the Fourth Proportional to 613.96, 845.10 and 555.64

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Solution

The fourth proportional to 613.96, 845.10 and 555.64 is: 764.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.96 : 845.10 = 555.64 : x
  2. Step 2: Convert to fraction form
    613.96/845.10 = 555.64/x
  3. Step 3: Cross multiply
    613.96x = 845.10 × 555.64
  4. Step 4: Simplify right side
    613.96x = 469,571.36
  5. Step 5: Solve for x
    x = 469,571.36/613.96
  6. Step 6: Final answer
    x = 764.82

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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.