Home / 1,308.85-1,962.11-528.86

Finding the Fourth Proportional to 1,308.85, 1,962.11 and 528.86

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Solution

The fourth proportional to 1,308.85, 1,962.11 and 528.86 is: 792.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.85 : 1,962.11 = 528.86 : x
  2. Step 2: Convert to fraction form
    1,308.85/1,962.11 = 528.86/x
  3. Step 3: Cross multiply
    1,308.85x = 1,962.11 × 528.86
  4. Step 4: Simplify right side
    1,308.85x = 1,037,687.72
  5. Step 5: Solve for x
    x = 1,037,687.72/1,308.85
  6. Step 6: Final answer
    x = 792.83

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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.