Home / 1,286.10-1,929.60-555.90

Finding the Fourth Proportional to 1,286.10, 1,929.60 and 555.90

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Solution

The fourth proportional to 1,286.10, 1,929.60 and 555.90 is: 834.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.10 : 1,929.60 = 555.90 : x
  2. Step 2: Convert to fraction form
    1,286.10/1,929.60 = 555.90/x
  3. Step 3: Cross multiply
    1,286.10x = 1,929.60 × 555.90
  4. Step 4: Simplify right side
    1,286.10x = 1,072,664.64
  5. Step 5: Solve for x
    x = 1,072,664.64/1,286.10
  6. Step 6: Final answer
    x = 834.04

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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.