Home / 2,810.21-3,878.22-1,691.49

Finding the Fourth Proportional to 2,810.21, 3,878.22 and 1,691.49

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Solution

The fourth proportional to 2,810.21, 3,878.22 and 1,691.49 is: 2,334.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.21 : 3,878.22 = 1,691.49 : x
  2. Step 2: Convert to fraction form
    2,810.21/3,878.22 = 1,691.49/x
  3. Step 3: Cross multiply
    2,810.21x = 3,878.22 × 1,691.49
  4. Step 4: Simplify right side
    2,810.21x = 6,559,970.35
  5. Step 5: Solve for x
    x = 6,559,970.35/2,810.21
  6. Step 6: Final answer
    x = 2,334.34

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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.