Home / 3,179.07-4,386.96-1,920.06

Finding the Fourth Proportional to 3,179.07, 4,386.96 and 1,920.06

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Solution

The fourth proportional to 3,179.07, 4,386.96 and 1,920.06 is: 2,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.07 : 4,386.96 = 1,920.06 : x
  2. Step 2: Convert to fraction form
    3,179.07/4,386.96 = 1,920.06/x
  3. Step 3: Cross multiply
    3,179.07x = 4,386.96 × 1,920.06
  4. Step 4: Simplify right side
    3,179.07x = 8,423,226.42
  5. Step 5: Solve for x
    x = 8,423,226.42/3,179.07
  6. Step 6: Final answer
    x = 2,649.59

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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.