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Finding the Fourth Proportional to 3,009.80, 4,152.90 and 1,767.80

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Solution

The fourth proportional to 3,009.80, 4,152.90 and 1,767.80 is: 2,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,009.80 : 4,152.90 = 1,767.80 : x
  2. Step 2: Convert to fraction form
    3,009.80/4,152.90 = 1,767.80/x
  3. Step 3: Cross multiply
    3,009.80x = 4,152.90 × 1,767.80
  4. Step 4: Simplify right side
    3,009.80x = 7,341,496.62
  5. Step 5: Solve for x
    x = 7,341,496.62/3,009.80
  6. Step 6: Final answer
    x = 2,439.20

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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.