Home / 2,142.24-2,955.84-1,210.56

Finding the Fourth Proportional to 2,142.24, 2,955.84 and 1,210.56

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Solution

The fourth proportional to 2,142.24, 2,955.84 and 1,210.56 is: 1,670.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.24 : 2,955.84 = 1,210.56 : x
  2. Step 2: Convert to fraction form
    2,142.24/2,955.84 = 1,210.56/x
  3. Step 3: Cross multiply
    2,142.24x = 2,955.84 × 1,210.56
  4. Step 4: Simplify right side
    2,142.24x = 3,578,221.67
  5. Step 5: Solve for x
    x = 3,578,221.67/2,142.24
  6. Step 6: Final answer
    x = 1,670.32

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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.