Home / 2,125.30-3,186.13-808.32

Finding the Fourth Proportional to 2,125.30, 3,186.13 and 808.32

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Solution

The fourth proportional to 2,125.30, 3,186.13 and 808.32 is: 1,211.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.30 : 3,186.13 = 808.32 : x
  2. Step 2: Convert to fraction form
    2,125.30/3,186.13 = 808.32/x
  3. Step 3: Cross multiply
    2,125.30x = 3,186.13 × 808.32
  4. Step 4: Simplify right side
    2,125.30x = 2,575,412.60
  5. Step 5: Solve for x
    x = 2,575,412.60/2,125.30
  6. Step 6: Final answer
    x = 1,211.79

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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.