Home / 3,979.02-5,486.76-2,486.39

Finding the Fourth Proportional to 3,979.02, 5,486.76 and 2,486.39

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Solution

The fourth proportional to 3,979.02, 5,486.76 and 2,486.39 is: 3,428.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.02 : 5,486.76 = 2,486.39 : x
  2. Step 2: Convert to fraction form
    3,979.02/5,486.76 = 2,486.39/x
  3. Step 3: Cross multiply
    3,979.02x = 5,486.76 × 2,486.39
  4. Step 4: Simplify right side
    3,979.02x = 13,642,225.20
  5. Step 5: Solve for x
    x = 13,642,225.20/3,979.02
  6. Step 6: Final answer
    x = 3,428.54

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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.