Home / 1,985.39-2,739.81-1,101.18

Finding the Fourth Proportional to 1,985.39, 2,739.81 and 1,101.18

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Solution

The fourth proportional to 1,985.39, 2,739.81 and 1,101.18 is: 1,519.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.39 : 2,739.81 = 1,101.18 : x
  2. Step 2: Convert to fraction form
    1,985.39/2,739.81 = 1,101.18/x
  3. Step 3: Cross multiply
    1,985.39x = 2,739.81 × 1,101.18
  4. Step 4: Simplify right side
    1,985.39x = 3,017,023.98
  5. Step 5: Solve for x
    x = 3,017,023.98/1,985.39
  6. Step 6: Final answer
    x = 1,519.62

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1.5x scale

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.