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Finding the Fourth Proportional to 2,750.86, 4,128.90 and 1,707.70

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Solution

The fourth proportional to 2,750.86, 4,128.90 and 1,707.70 is: 2,563.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,750.86 : 4,128.90 = 1,707.70 : x
  2. Step 2: Convert to fraction form
    2,750.86/4,128.90 = 1,707.70/x
  3. Step 3: Cross multiply
    2,750.86x = 4,128.90 × 1,707.70
  4. Step 4: Simplify right side
    2,750.86x = 7,050,926.80
  5. Step 5: Solve for x
    x = 7,050,926.80/2,750.86
  6. Step 6: Final answer
    x = 2,563.18

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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.