Home / 1,985.50-2,739.99-1,199.70

Finding the Fourth Proportional to 1,985.50, 2,739.99 and 1,199.70

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Solution

The fourth proportional to 1,985.50, 2,739.99 and 1,199.70 is: 1,655.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.50 : 2,739.99 = 1,199.70 : x
  2. Step 2: Convert to fraction form
    1,985.50/2,739.99 = 1,199.70/x
  3. Step 3: Cross multiply
    1,985.50x = 2,739.99 × 1,199.70
  4. Step 4: Simplify right side
    1,985.50x = 3,287,166.00
  5. Step 5: Solve for x
    x = 3,287,166.00/1,985.50
  6. Step 6: Final answer
    x = 1,655.59

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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.