Home / 2,847.40-3,929.36-1,605.40

Finding the Fourth Proportional to 2,847.40, 3,929.36 and 1,605.40

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Solution

The fourth proportional to 2,847.40, 3,929.36 and 1,605.40 is: 2,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.40 : 3,929.36 = 1,605.40 : x
  2. Step 2: Convert to fraction form
    2,847.40/3,929.36 = 1,605.40/x
  3. Step 3: Cross multiply
    2,847.40x = 3,929.36 × 1,605.40
  4. Step 4: Simplify right side
    2,847.40x = 6,308,194.54
  5. Step 5: Solve for x
    x = 6,308,194.54/2,847.40
  6. Step 6: Final answer
    x = 2,215.42

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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.