Home / 4,215.20-6,315.60-2,980.24

Finding the Fourth Proportional to 4,215.20, 6,315.60 and 2,980.24

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Solution

The fourth proportional to 4,215.20, 6,315.60 and 2,980.24 is: 4,465.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,215.20 : 6,315.60 = 2,980.24 : x
  2. Step 2: Convert to fraction form
    4,215.20/6,315.60 = 2,980.24/x
  3. Step 3: Cross multiply
    4,215.20x = 6,315.60 × 2,980.24
  4. Step 4: Simplify right side
    4,215.20x = 18,822,003.74
  5. Step 5: Solve for x
    x = 18,822,003.74/4,215.20
  6. Step 6: Final answer
    x = 4,465.27

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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.