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Finding the Fourth Proportional to 3,242.80, 4,857.80 and 3,012.40

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Solution

The fourth proportional to 3,242.80, 4,857.80 and 3,012.40 is: 4,512.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,242.80 : 4,857.80 = 3,012.40 : x
  2. Step 2: Convert to fraction form
    3,242.80/4,857.80 = 3,012.40/x
  3. Step 3: Cross multiply
    3,242.80x = 4,857.80 × 3,012.40
  4. Step 4: Simplify right side
    3,242.80x = 14,633,636.72
  5. Step 5: Solve for x
    x = 14,633,636.72/3,242.80
  6. Step 6: Final answer
    x = 4,512.65

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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.