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Finding the Fourth Proportional to 2,107.88, 3,160.72 and 953

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Solution

The fourth proportional to 2,107.88, 3,160.72 and 953 is: 1,429.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.88 : 3,160.72 = 953 : x
  2. Step 2: Convert to fraction form
    2,107.88/3,160.72 = 953/x
  3. Step 3: Cross multiply
    2,107.88x = 3,160.72 × 953
  4. Step 4: Simplify right side
    2,107.88x = 3,012,166.16
  5. Step 5: Solve for x
    x = 3,012,166.16/2,107.88
  6. Step 6: Final answer
    x = 1,429.00

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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.