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Finding the Fourth Proportional to 2,107.53, 3,160.92 and 646.29

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Solution

The fourth proportional to 2,107.53, 3,160.92 and 646.29 is: 969.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.53 : 3,160.92 = 646.29 : x
  2. Step 2: Convert to fraction form
    2,107.53/3,160.92 = 646.29/x
  3. Step 3: Cross multiply
    2,107.53x = 3,160.92 × 646.29
  4. Step 4: Simplify right side
    2,107.53x = 2,042,870.99
  5. Step 5: Solve for x
    x = 2,042,870.99/2,107.53
  6. Step 6: Final answer
    x = 969.32

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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.