Home / 2,156.66-2,976.30-1,272.74

Finding the Fourth Proportional to 2,156.66, 2,976.30 and 1,272.74

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Solution

The fourth proportional to 2,156.66, 2,976.30 and 1,272.74 is: 1,756.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.66 : 2,976.30 = 1,272.74 : x
  2. Step 2: Convert to fraction form
    2,156.66/2,976.30 = 1,272.74/x
  3. Step 3: Cross multiply
    2,156.66x = 2,976.30 × 1,272.74
  4. Step 4: Simplify right side
    2,156.66x = 3,788,056.06
  5. Step 5: Solve for x
    x = 3,788,056.06/2,156.66
  6. Step 6: Final answer
    x = 1,756.45

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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.