Home / 2,847.28-3,929.20-1,605.28

Finding the Fourth Proportional to 2,847.28, 3,929.20 and 1,605.28

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Solution

The fourth proportional to 2,847.28, 3,929.20 and 1,605.28 is: 2,215.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.28 : 3,929.20 = 1,605.28 : x
  2. Step 2: Convert to fraction form
    2,847.28/3,929.20 = 1,605.28/x
  3. Step 3: Cross multiply
    2,847.28x = 3,929.20 × 1,605.28
  4. Step 4: Simplify right side
    2,847.28x = 6,307,466.18
  5. Step 5: Solve for x
    x = 6,307,466.18/2,847.28
  6. Step 6: Final answer
    x = 2,215.26

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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.