Home / 1,531.20-2,111.63-1,199.04

Finding the Fourth Proportional to 1,531.20, 2,111.63 and 1,199.04

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Solution

The fourth proportional to 1,531.20, 2,111.63 and 1,199.04 is: 1,653.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.20 : 2,111.63 = 1,199.04 : x
  2. Step 2: Convert to fraction form
    1,531.20/2,111.63 = 1,199.04/x
  3. Step 3: Cross multiply
    1,531.20x = 2,111.63 × 1,199.04
  4. Step 4: Simplify right side
    1,531.20x = 2,531,922.84
  5. Step 5: Solve for x
    x = 2,531,922.84/1,531.20
  6. Step 6: Final answer
    x = 1,653.55

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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.