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Finding the Fourth Proportional to 2,114.07, 3,172.01 and 816.45

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Solution

The fourth proportional to 2,114.07, 3,172.01 and 816.45 is: 1,225.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.07 : 3,172.01 = 816.45 : x
  2. Step 2: Convert to fraction form
    2,114.07/3,172.01 = 816.45/x
  3. Step 3: Cross multiply
    2,114.07x = 3,172.01 × 816.45
  4. Step 4: Simplify right side
    2,114.07x = 2,589,767.62
  5. Step 5: Solve for x
    x = 2,589,767.62/2,114.07
  6. Step 6: Final answer
    x = 1,225.02

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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.