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Finding the Fourth Proportional to 2,812.59, 3,881.07 and 1,678.05

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Solution

The fourth proportional to 2,812.59, 3,881.07 and 1,678.05 is: 2,315.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.59 : 3,881.07 = 1,678.05 : x
  2. Step 2: Convert to fraction form
    2,812.59/3,881.07 = 1,678.05/x
  3. Step 3: Cross multiply
    2,812.59x = 3,881.07 × 1,678.05
  4. Step 4: Simplify right side
    2,812.59x = 6,512,629.51
  5. Step 5: Solve for x
    x = 6,512,629.51/2,812.59
  6. Step 6: Final answer
    x = 2,315.53

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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.