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Finding the Fourth Proportional to 2,509.50, 3,764.25 and 685.50

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Solution

The fourth proportional to 2,509.50, 3,764.25 and 685.50 is: 1,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,509.50 : 3,764.25 = 685.50 : x
  2. Step 2: Convert to fraction form
    2,509.50/3,764.25 = 685.50/x
  3. Step 3: Cross multiply
    2,509.50x = 3,764.25 × 685.50
  4. Step 4: Simplify right side
    2,509.50x = 2,580,393.38
  5. Step 5: Solve for x
    x = 2,580,393.38/2,509.50
  6. Step 6: Final answer
    x = 1,028.25

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Double scale
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Similar ratio
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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.