Home / 2,113.20-2,916.74-1,228.88

Finding the Fourth Proportional to 2,113.20, 2,916.74 and 1,228.88

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Solution

The fourth proportional to 2,113.20, 2,916.74 and 1,228.88 is: 1,696.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.20 : 2,916.74 = 1,228.88 : x
  2. Step 2: Convert to fraction form
    2,113.20/2,916.74 = 1,228.88/x
  3. Step 3: Cross multiply
    2,113.20x = 2,916.74 × 1,228.88
  4. Step 4: Simplify right side
    2,113.20x = 3,584,323.45
  5. Step 5: Solve for x
    x = 3,584,323.45/2,113.20
  6. Step 6: Final answer
    x = 1,696.16

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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.