Home / 1,447.16-2,172.42-755.15

Finding the Fourth Proportional to 1,447.16, 2,172.42 and 755.15

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Solution

The fourth proportional to 1,447.16, 2,172.42 and 755.15 is: 1,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.16 : 2,172.42 = 755.15 : x
  2. Step 2: Convert to fraction form
    1,447.16/2,172.42 = 755.15/x
  3. Step 3: Cross multiply
    1,447.16x = 2,172.42 × 755.15
  4. Step 4: Simplify right side
    1,447.16x = 1,640,492.10
  5. Step 5: Solve for x
    x = 1,640,492.10/1,447.16
  6. Step 6: Final answer
    x = 1,133.60

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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.