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Finding the Fourth Proportional to 2,765.61, 4,148.36 and 685.62

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Solution

The fourth proportional to 2,765.61, 4,148.36 and 685.62 is: 1,028.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.61 : 4,148.36 = 685.62 : x
  2. Step 2: Convert to fraction form
    2,765.61/4,148.36 = 685.62/x
  3. Step 3: Cross multiply
    2,765.61x = 4,148.36 × 685.62
  4. Step 4: Simplify right side
    2,765.61x = 2,844,174.41
  5. Step 5: Solve for x
    x = 2,844,174.41/2,765.61
  6. Step 6: Final answer
    x = 1,028.41

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1.5x scale

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.