Home / 1,987.72-2,984.16-1,623.28

Finding the Fourth Proportional to 1,987.72, 2,984.16 and 1,623.28

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Solution

The fourth proportional to 1,987.72, 2,984.16 and 1,623.28 is: 2,437.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.72 : 2,984.16 = 1,623.28 : x
  2. Step 2: Convert to fraction form
    1,987.72/2,984.16 = 1,623.28/x
  3. Step 3: Cross multiply
    1,987.72x = 2,984.16 × 1,623.28
  4. Step 4: Simplify right side
    1,987.72x = 4,844,127.24
  5. Step 5: Solve for x
    x = 4,844,127.24/1,987.72
  6. Step 6: Final answer
    x = 2,437.03

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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.