Home / 2,820.40-3,892.08-1,642.12

Finding the Fourth Proportional to 2,820.40, 3,892.08 and 1,642.12

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Solution

The fourth proportional to 2,820.40, 3,892.08 and 1,642.12 is: 2,266.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.40 : 3,892.08 = 1,642.12 : x
  2. Step 2: Convert to fraction form
    2,820.40/3,892.08 = 1,642.12/x
  3. Step 3: Cross multiply
    2,820.40x = 3,892.08 × 1,642.12
  4. Step 4: Simplify right side
    2,820.40x = 6,391,262.41
  5. Step 5: Solve for x
    x = 6,391,262.41/2,820.40
  6. Step 6: Final answer
    x = 2,266.08

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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.