Home / 3,137.30-4,705.95-828.80

Finding the Fourth Proportional to 3,137.30, 4,705.95 and 828.80

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Solution

The fourth proportional to 3,137.30, 4,705.95 and 828.80 is: 1,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.30 : 4,705.95 = 828.80 : x
  2. Step 2: Convert to fraction form
    3,137.30/4,705.95 = 828.80/x
  3. Step 3: Cross multiply
    3,137.30x = 4,705.95 × 828.80
  4. Step 4: Simplify right side
    3,137.30x = 3,900,291.36
  5. Step 5: Solve for x
    x = 3,900,291.36/3,137.30
  6. Step 6: Final answer
    x = 1,243.20

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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.