Home / 2,847.36-3,929.64-1,728.66

Finding the Fourth Proportional to 2,847.36, 3,929.64 and 1,728.66

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Solution

The fourth proportional to 2,847.36, 3,929.64 and 1,728.66 is: 2,385.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.36 : 3,929.64 = 1,728.66 : x
  2. Step 2: Convert to fraction form
    2,847.36/3,929.64 = 1,728.66/x
  3. Step 3: Cross multiply
    2,847.36x = 3,929.64 × 1,728.66
  4. Step 4: Simplify right side
    2,847.36x = 6,793,011.48
  5. Step 5: Solve for x
    x = 6,793,011.48/2,847.36
  6. Step 6: Final answer
    x = 2,385.72

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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.