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Finding the Fourth Proportional to 1,851.63, 2,555.19 and 1,065.81

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Solution

The fourth proportional to 1,851.63, 2,555.19 and 1,065.81 is: 1,470.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.63 : 2,555.19 = 1,065.81 : x
  2. Step 2: Convert to fraction form
    1,851.63/2,555.19 = 1,065.81/x
  3. Step 3: Cross multiply
    1,851.63x = 2,555.19 × 1,065.81
  4. Step 4: Simplify right side
    1,851.63x = 2,723,347.05
  5. Step 5: Solve for x
    x = 2,723,347.05/1,851.63
  6. Step 6: Final answer
    x = 1,470.78

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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.