Home / 1,219.77-1,682.70-1,172.62

Finding the Fourth Proportional to 1,219.77, 1,682.70 and 1,172.62

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Solution

The fourth proportional to 1,219.77, 1,682.70 and 1,172.62 is: 1,617.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.77 : 1,682.70 = 1,172.62 : x
  2. Step 2: Convert to fraction form
    1,219.77/1,682.70 = 1,172.62/x
  3. Step 3: Cross multiply
    1,219.77x = 1,682.70 × 1,172.62
  4. Step 4: Simplify right side
    1,219.77x = 1,973,167.67
  5. Step 5: Solve for x
    x = 1,973,167.67/1,219.77
  6. Step 6: Final answer
    x = 1,617.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.