Home / 2,847.45-3,929.46-1,605.45

Finding the Fourth Proportional to 2,847.45, 3,929.46 and 1,605.45

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Solution

The fourth proportional to 2,847.45, 3,929.46 and 1,605.45 is: 2,215.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.45 : 3,929.46 = 1,605.45 : x
  2. Step 2: Convert to fraction form
    2,847.45/3,929.46 = 1,605.45/x
  3. Step 3: Cross multiply
    2,847.45x = 3,929.46 × 1,605.45
  4. Step 4: Simplify right side
    2,847.45x = 6,308,551.56
  5. Step 5: Solve for x
    x = 6,308,551.56/2,847.45
  6. Step 6: Final answer
    x = 2,215.51

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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.