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Finding the Fourth Proportional to 2,710.25, 4,065.60 and 762.47

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Solution

The fourth proportional to 2,710.25, 4,065.60 and 762.47 is: 1,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,710.25 : 4,065.60 = 762.47 : x
  2. Step 2: Convert to fraction form
    2,710.25/4,065.60 = 762.47/x
  3. Step 3: Cross multiply
    2,710.25x = 4,065.60 × 762.47
  4. Step 4: Simplify right side
    2,710.25x = 3,099,898.03
  5. Step 5: Solve for x
    x = 3,099,898.03/2,710.25
  6. Step 6: Final answer
    x = 1,143.77

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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.