Home / 2,173.78-2,999.76-1,242.28

Finding the Fourth Proportional to 2,173.78, 2,999.76 and 1,242.28

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Solution

The fourth proportional to 2,173.78, 2,999.76 and 1,242.28 is: 1,714.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.78 : 2,999.76 = 1,242.28 : x
  2. Step 2: Convert to fraction form
    2,173.78/2,999.76 = 1,242.28/x
  3. Step 3: Cross multiply
    2,173.78x = 2,999.76 × 1,242.28
  4. Step 4: Simplify right side
    2,173.78x = 3,726,541.85
  5. Step 5: Solve for x
    x = 3,726,541.85/2,173.78
  6. Step 6: Final answer
    x = 1,714.31

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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.