Home / 1,985.56-2,740.36-1,199.72

Finding the Fourth Proportional to 1,985.56, 2,740.36 and 1,199.72

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Solution

The fourth proportional to 1,985.56, 2,740.36 and 1,199.72 is: 1,655.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.56 : 2,740.36 = 1,199.72 : x
  2. Step 2: Convert to fraction form
    1,985.56/2,740.36 = 1,199.72/x
  3. Step 3: Cross multiply
    1,985.56x = 2,740.36 × 1,199.72
  4. Step 4: Simplify right side
    1,985.56x = 3,287,664.70
  5. Step 5: Solve for x
    x = 3,287,664.70/1,985.56
  6. Step 6: Final answer
    x = 1,655.79

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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.