Home / 2,422.89-3,342.75-1,428.48

Finding the Fourth Proportional to 2,422.89, 3,342.75 and 1,428.48

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Solution

The fourth proportional to 2,422.89, 3,342.75 and 1,428.48 is: 1,970.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,422.89 : 3,342.75 = 1,428.48 : x
  2. Step 2: Convert to fraction form
    2,422.89/3,342.75 = 1,428.48/x
  3. Step 3: Cross multiply
    2,422.89x = 3,342.75 × 1,428.48
  4. Step 4: Simplify right side
    2,422.89x = 4,775,051.52
  5. Step 5: Solve for x
    x = 4,775,051.52/2,422.89
  6. Step 6: Final answer
    x = 1,970.81

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1.5x scale

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.