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Finding the Fourth Proportional to 2,859.70, 4,293.60 and 1,766.20

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Solution

The fourth proportional to 2,859.70, 4,293.60 and 1,766.20 is: 2,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.70 : 4,293.60 = 1,766.20 : x
  2. Step 2: Convert to fraction form
    2,859.70/4,293.60 = 1,766.20/x
  3. Step 3: Cross multiply
    2,859.70x = 4,293.60 × 1,766.20
  4. Step 4: Simplify right side
    2,859.70x = 7,583,356.32
  5. Step 5: Solve for x
    x = 7,583,356.32/2,859.70
  6. Step 6: Final answer
    x = 2,651.80

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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.