Home / 2,172.08-3,242.40-1,909.36

Finding the Fourth Proportional to 2,172.08, 3,242.40 and 1,909.36

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Solution

The fourth proportional to 2,172.08, 3,242.40 and 1,909.36 is: 2,850.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.08 : 3,242.40 = 1,909.36 : x
  2. Step 2: Convert to fraction form
    2,172.08/3,242.40 = 1,909.36/x
  3. Step 3: Cross multiply
    2,172.08x = 3,242.40 × 1,909.36
  4. Step 4: Simplify right side
    2,172.08x = 6,190,908.86
  5. Step 5: Solve for x
    x = 6,190,908.86/2,172.08
  6. Step 6: Final answer
    x = 2,850.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.