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Finding the Fourth Proportional to 2,978.81, 4,111.02 and 1,652.77

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Solution

The fourth proportional to 2,978.81, 4,111.02 and 1,652.77 is: 2,280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978.81 : 4,111.02 = 1,652.77 : x
  2. Step 2: Convert to fraction form
    2,978.81/4,111.02 = 1,652.77/x
  3. Step 3: Cross multiply
    2,978.81x = 4,111.02 × 1,652.77
  4. Step 4: Simplify right side
    2,978.81x = 6,794,575.66
  5. Step 5: Solve for x
    x = 6,794,575.66/2,978.81
  6. Step 6: Final answer
    x = 2,280.97

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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.