Home / 2,786.40-4,179.65-1,031.55

Finding the Fourth Proportional to 2,786.40, 4,179.65 and 1,031.55

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Solution

The fourth proportional to 2,786.40, 4,179.65 and 1,031.55 is: 1,547.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.40 : 4,179.65 = 1,031.55 : x
  2. Step 2: Convert to fraction form
    2,786.40/4,179.65 = 1,031.55/x
  3. Step 3: Cross multiply
    2,786.40x = 4,179.65 × 1,031.55
  4. Step 4: Simplify right side
    2,786.40x = 4,311,512.80
  5. Step 5: Solve for x
    x = 4,311,512.80/2,786.40
  6. Step 6: Final answer
    x = 1,547.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.