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Finding the Fourth Proportional to 2,114.34, 3,172.95 and 960.90

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Solution

The fourth proportional to 2,114.34, 3,172.95 and 960.90 is: 1,442.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.34 : 3,172.95 = 960.90 : x
  2. Step 2: Convert to fraction form
    2,114.34/3,172.95 = 960.90/x
  3. Step 3: Cross multiply
    2,114.34x = 3,172.95 × 960.90
  4. Step 4: Simplify right side
    2,114.34x = 3,048,887.66
  5. Step 5: Solve for x
    x = 3,048,887.66/2,114.34
  6. Step 6: Final answer
    x = 1,442.00

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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.