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Finding the Fourth Proportional to 3,641.31, 5,461.97 and 905.31

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Solution

The fourth proportional to 3,641.31, 5,461.97 and 905.31 is: 1,357.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,641.31 : 5,461.97 = 905.31 : x
  2. Step 2: Convert to fraction form
    3,641.31/5,461.97 = 905.31/x
  3. Step 3: Cross multiply
    3,641.31x = 5,461.97 × 905.31
  4. Step 4: Simplify right side
    3,641.31x = 4,944,776.06
  5. Step 5: Solve for x
    x = 4,944,776.06/3,641.31
  6. Step 6: Final answer
    x = 1,357.97

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1.5x scale

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.