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Finding the Fourth Proportional to 2,762.85, 3,812.31 and 1,643.76

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Solution

The fourth proportional to 2,762.85, 3,812.31 and 1,643.76 is: 2,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762.85 : 3,812.31 = 1,643.76 : x
  2. Step 2: Convert to fraction form
    2,762.85/3,812.31 = 1,643.76/x
  3. Step 3: Cross multiply
    2,762.85x = 3,812.31 × 1,643.76
  4. Step 4: Simplify right side
    2,762.85x = 6,266,522.69
  5. Step 5: Solve for x
    x = 6,266,522.69/2,762.85
  6. Step 6: Final answer
    x = 2,268.14

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1.5x scale

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.