Home / 2,185.90-3,278.76-887.36

Finding the Fourth Proportional to 2,185.90, 3,278.76 and 887.36

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Solution

The fourth proportional to 2,185.90, 3,278.76 and 887.36 is: 1,331.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.90 : 3,278.76 = 887.36 : x
  2. Step 2: Convert to fraction form
    2,185.90/3,278.76 = 887.36/x
  3. Step 3: Cross multiply
    2,185.90x = 3,278.76 × 887.36
  4. Step 4: Simplify right side
    2,185.90x = 2,909,440.47
  5. Step 5: Solve for x
    x = 2,909,440.47/2,185.90
  6. Step 6: Final answer
    x = 1,331.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.