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Finding the Fourth Proportional to 1,661.55, 2,479.51 and 1,453.78

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Solution

The fourth proportional to 1,661.55, 2,479.51 and 1,453.78 is: 2,169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.55 : 2,479.51 = 1,453.78 : x
  2. Step 2: Convert to fraction form
    1,661.55/2,479.51 = 1,453.78/x
  3. Step 3: Cross multiply
    1,661.55x = 2,479.51 × 1,453.78
  4. Step 4: Simplify right side
    1,661.55x = 3,604,662.05
  5. Step 5: Solve for x
    x = 3,604,662.05/1,661.55
  6. Step 6: Final answer
    x = 2,169.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.