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Finding the Fourth Proportional to 2,172.99, 3,259.49 and 1,247.16

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Solution

The fourth proportional to 2,172.99, 3,259.49 and 1,247.16 is: 1,870.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.99 : 3,259.49 = 1,247.16 : x
  2. Step 2: Convert to fraction form
    2,172.99/3,259.49 = 1,247.16/x
  3. Step 3: Cross multiply
    2,172.99x = 3,259.49 × 1,247.16
  4. Step 4: Simplify right side
    2,172.99x = 4,065,099.31
  5. Step 5: Solve for x
    x = 4,065,099.31/2,172.99
  6. Step 6: Final answer
    x = 1,870.74

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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.