Home / 2,174.72-3,001.12-1,389.60

Finding the Fourth Proportional to 2,174.72, 3,001.12 and 1,389.60

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Solution

The fourth proportional to 2,174.72, 3,001.12 and 1,389.60 is: 1,917.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.72 : 3,001.12 = 1,389.60 : x
  2. Step 2: Convert to fraction form
    2,174.72/3,001.12 = 1,389.60/x
  3. Step 3: Cross multiply
    2,174.72x = 3,001.12 × 1,389.60
  4. Step 4: Simplify right side
    2,174.72x = 4,170,356.35
  5. Step 5: Solve for x
    x = 4,170,356.35/2,174.72
  6. Step 6: Final answer
    x = 1,917.65

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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.