Home / 2,975.24-4,101.36-1,978.40

Finding the Fourth Proportional to 2,975.24, 4,101.36 and 1,978.40

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Solution

The fourth proportional to 2,975.24, 4,101.36 and 1,978.40 is: 2,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,975.24 : 4,101.36 = 1,978.40 : x
  2. Step 2: Convert to fraction form
    2,975.24/4,101.36 = 1,978.40/x
  3. Step 3: Cross multiply
    2,975.24x = 4,101.36 × 1,978.40
  4. Step 4: Simplify right side
    2,975.24x = 8,114,130.62
  5. Step 5: Solve for x
    x = 8,114,130.62/2,975.24
  6. Step 6: Final answer
    x = 2,727.22

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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.