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Finding the Fourth Proportional to 3,314.80, 4,966.80 and 3,120.40

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Solution

The fourth proportional to 3,314.80, 4,966.80 and 3,120.40 is: 4,675.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,314.80 : 4,966.80 = 3,120.40 : x
  2. Step 2: Convert to fraction form
    3,314.80/4,966.80 = 3,120.40/x
  3. Step 3: Cross multiply
    3,314.80x = 4,966.80 × 3,120.40
  4. Step 4: Simplify right side
    3,314.80x = 15,498,402.72
  5. Step 5: Solve for x
    x = 15,498,402.72/3,314.80
  6. Step 6: Final answer
    x = 4,675.52

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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.