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Finding the Fourth Proportional to 3,101.80, 4,653.12 and 910.21

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Solution

The fourth proportional to 3,101.80, 4,653.12 and 910.21 is: 1,365.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.80 : 4,653.12 = 910.21 : x
  2. Step 2: Convert to fraction form
    3,101.80/4,653.12 = 910.21/x
  3. Step 3: Cross multiply
    3,101.80x = 4,653.12 × 910.21
  4. Step 4: Simplify right side
    3,101.80x = 4,235,316.36
  5. Step 5: Solve for x
    x = 4,235,316.36/3,101.80
  6. Step 6: Final answer
    x = 1,365.44

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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.