Home / 1,212.50-1,808.68-1,172.01

Finding the Fourth Proportional to 1,212.50, 1,808.68 and 1,172.01

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Solution

The fourth proportional to 1,212.50, 1,808.68 and 1,172.01 is: 1,748.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.50 : 1,808.68 = 1,172.01 : x
  2. Step 2: Convert to fraction form
    1,212.50/1,808.68 = 1,172.01/x
  3. Step 3: Cross multiply
    1,212.50x = 1,808.68 × 1,172.01
  4. Step 4: Simplify right side
    1,212.50x = 2,119,782.00
  5. Step 5: Solve for x
    x = 2,119,782.00/1,212.50
  6. Step 6: Final answer
    x = 1,748.27

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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.