Home / 2,816.90-3,887.15-1,698.20

Finding the Fourth Proportional to 2,816.90, 3,887.15 and 1,698.20

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Solution

The fourth proportional to 2,816.90, 3,887.15 and 1,698.20 is: 2,343.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.90 : 3,887.15 = 1,698.20 : x
  2. Step 2: Convert to fraction form
    2,816.90/3,887.15 = 1,698.20/x
  3. Step 3: Cross multiply
    2,816.90x = 3,887.15 × 1,698.20
  4. Step 4: Simplify right side
    2,816.90x = 6,601,130.20
  5. Step 5: Solve for x
    x = 6,601,130.20/2,816.90
  6. Step 6: Final answer
    x = 2,343.41

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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.