Home / 1,330.20-1,997.10-1,056.60

Finding the Fourth Proportional to 1,330.20, 1,997.10 and 1,056.60

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Solution

The fourth proportional to 1,330.20, 1,997.10 and 1,056.60 is: 1,586.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.20 : 1,997.10 = 1,056.60 : x
  2. Step 2: Convert to fraction form
    1,330.20/1,997.10 = 1,056.60/x
  3. Step 3: Cross multiply
    1,330.20x = 1,997.10 × 1,056.60
  4. Step 4: Simplify right side
    1,330.20x = 2,110,135.86
  5. Step 5: Solve for x
    x = 2,110,135.86/1,330.20
  6. Step 6: Final answer
    x = 1,586.33

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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.