Home / 1,987.60-2,979.45-1,110.84

Finding the Fourth Proportional to 1,987.60, 2,979.45 and 1,110.84

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Solution

The fourth proportional to 1,987.60, 2,979.45 and 1,110.84 is: 1,665.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.60 : 2,979.45 = 1,110.84 : x
  2. Step 2: Convert to fraction form
    1,987.60/2,979.45 = 1,110.84/x
  3. Step 3: Cross multiply
    1,987.60x = 2,979.45 × 1,110.84
  4. Step 4: Simplify right side
    1,987.60x = 3,309,698.89
  5. Step 5: Solve for x
    x = 3,309,698.89/1,987.60
  6. Step 6: Final answer
    x = 1,665.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.