Home / 2,721.36-4,079.52-1,421.28

Finding the Fourth Proportional to 2,721.36, 4,079.52 and 1,421.28

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Solution

The fourth proportional to 2,721.36, 4,079.52 and 1,421.28 is: 2,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.36 : 4,079.52 = 1,421.28 : x
  2. Step 2: Convert to fraction form
    2,721.36/4,079.52 = 1,421.28/x
  3. Step 3: Cross multiply
    2,721.36x = 4,079.52 × 1,421.28
  4. Step 4: Simplify right side
    2,721.36x = 5,798,140.19
  5. Step 5: Solve for x
    x = 5,798,140.19/2,721.36
  6. Step 6: Final answer
    x = 2,130.60

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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.