Home / 2,178.32-3,009.84-1,915.88

Finding the Fourth Proportional to 2,178.32, 3,009.84 and 1,915.88

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Solution

The fourth proportional to 2,178.32, 3,009.84 and 1,915.88 is: 2,647.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.32 : 3,009.84 = 1,915.88 : x
  2. Step 2: Convert to fraction form
    2,178.32/3,009.84 = 1,915.88/x
  3. Step 3: Cross multiply
    2,178.32x = 3,009.84 × 1,915.88
  4. Step 4: Simplify right side
    2,178.32x = 5,766,492.26
  5. Step 5: Solve for x
    x = 5,766,492.26/2,178.32
  6. Step 6: Final answer
    x = 2,647.22

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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.