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Finding the Fourth Proportional to 2,766.40, 4,150.20 and 917.20

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Solution

The fourth proportional to 2,766.40, 4,150.20 and 917.20 is: 1,376.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,766.40 : 4,150.20 = 917.20 : x
  2. Step 2: Convert to fraction form
    2,766.40/4,150.20 = 917.20/x
  3. Step 3: Cross multiply
    2,766.40x = 4,150.20 × 917.20
  4. Step 4: Simplify right side
    2,766.40x = 3,806,563.44
  5. Step 5: Solve for x
    x = 3,806,563.44/2,766.40
  6. Step 6: Final answer
    x = 1,376.00

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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.