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Finding the Fourth Proportional to 2,847.59, 3,929.39 and 1,728.46

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Solution

The fourth proportional to 2,847.59, 3,929.39 and 1,728.46 is: 2,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.59 : 3,929.39 = 1,728.46 : x
  2. Step 2: Convert to fraction form
    2,847.59/3,929.39 = 1,728.46/x
  3. Step 3: Cross multiply
    2,847.59x = 3,929.39 × 1,728.46
  4. Step 4: Simplify right side
    2,847.59x = 6,791,796.19
  5. Step 5: Solve for x
    x = 6,791,796.19/2,847.59
  6. Step 6: Final answer
    x = 2,385.10

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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.