Home / 1,217.46-1,826.10-911.28

Finding the Fourth Proportional to 1,217.46, 1,826.10 and 911.28

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Solution

The fourth proportional to 1,217.46, 1,826.10 and 911.28 is: 1,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.46 : 1,826.10 = 911.28 : x
  2. Step 2: Convert to fraction form
    1,217.46/1,826.10 = 911.28/x
  3. Step 3: Cross multiply
    1,217.46x = 1,826.10 × 911.28
  4. Step 4: Simplify right side
    1,217.46x = 1,664,088.41
  5. Step 5: Solve for x
    x = 1,664,088.41/1,217.46
  6. Step 6: Final answer
    x = 1,366.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.