Home / 1,987.96-2,979.58-1,499.40

Finding the Fourth Proportional to 1,987.96, 2,979.58 and 1,499.40

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Solution

The fourth proportional to 1,987.96, 2,979.58 and 1,499.40 is: 2,247.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.96 : 2,979.58 = 1,499.40 : x
  2. Step 2: Convert to fraction form
    1,987.96/2,979.58 = 1,499.40/x
  3. Step 3: Cross multiply
    1,987.96x = 2,979.58 × 1,499.40
  4. Step 4: Simplify right side
    1,987.96x = 4,467,582.25
  5. Step 5: Solve for x
    x = 4,467,582.25/1,987.96
  6. Step 6: Final answer
    x = 2,247.32

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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.