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Finding the Fourth Proportional to 2,472.36, 3,415.19 and 1,978.53

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Solution

The fourth proportional to 2,472.36, 3,415.19 and 1,978.53 is: 2,733.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,472.36 : 3,415.19 = 1,978.53 : x
  2. Step 2: Convert to fraction form
    2,472.36/3,415.19 = 1,978.53/x
  3. Step 3: Cross multiply
    2,472.36x = 3,415.19 × 1,978.53
  4. Step 4: Simplify right side
    2,472.36x = 6,757,055.87
  5. Step 5: Solve for x
    x = 6,757,055.87/2,472.36
  6. Step 6: Final answer
    x = 2,733.04

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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.