Home / 2,157.80-2,977.32-1,273

Finding the Fourth Proportional to 2,157.80, 2,977.32 and 1,273

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Solution

The fourth proportional to 2,157.80, 2,977.32 and 1,273 is: 1,756.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.80 : 2,977.32 = 1,273 : x
  2. Step 2: Convert to fraction form
    2,157.80/2,977.32 = 1,273/x
  3. Step 3: Cross multiply
    2,157.80x = 2,977.32 × 1,273
  4. Step 4: Simplify right side
    2,157.80x = 3,790,128.36
  5. Step 5: Solve for x
    x = 3,790,128.36/2,157.80
  6. Step 6: Final answer
    x = 1,756.48

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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.