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Finding the Fourth Proportional to 515.26, 777.22 and 485.32

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Solution

The fourth proportional to 515.26, 777.22 and 485.32 is: 732.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.26 : 777.22 = 485.32 : x
  2. Step 2: Convert to fraction form
    515.26/777.22 = 485.32/x
  3. Step 3: Cross multiply
    515.26x = 777.22 × 485.32
  4. Step 4: Simplify right side
    515.26x = 377,200.41
  5. Step 5: Solve for x
    x = 377,200.41/515.26
  6. Step 6: Final answer
    x = 732.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.