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Finding the Fourth Proportional to 3,100.91, 4,651.37 and 760.92

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Solution

The fourth proportional to 3,100.91, 4,651.37 and 760.92 is: 1,141.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.91 : 4,651.37 = 760.92 : x
  2. Step 2: Convert to fraction form
    3,100.91/4,651.37 = 760.92/x
  3. Step 3: Cross multiply
    3,100.91x = 4,651.37 × 760.92
  4. Step 4: Simplify right side
    3,100.91x = 3,539,319.51
  5. Step 5: Solve for x
    x = 3,539,319.51/3,100.91
  6. Step 6: Final answer
    x = 1,141.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.