Home / 3,412.80-4,714.20-3,315.60

Finding the Fourth Proportional to 3,412.80, 4,714.20 and 3,315.60

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Solution

The fourth proportional to 3,412.80, 4,714.20 and 3,315.60 is: 4,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.80 : 4,714.20 = 3,315.60 : x
  2. Step 2: Convert to fraction form
    3,412.80/4,714.20 = 3,315.60/x
  3. Step 3: Cross multiply
    3,412.80x = 4,714.20 × 3,315.60
  4. Step 4: Simplify right side
    3,412.80x = 15,630,401.52
  5. Step 5: Solve for x
    x = 15,630,401.52/3,412.80
  6. Step 6: Final answer
    x = 4,579.93

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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.