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Finding the Fourth Proportional to 1,761.30, 2,642.09 and 528.62

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Solution

The fourth proportional to 1,761.30, 2,642.09 and 528.62 is: 792.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.30 : 2,642.09 = 528.62 : x
  2. Step 2: Convert to fraction form
    1,761.30/2,642.09 = 528.62/x
  3. Step 3: Cross multiply
    1,761.30x = 2,642.09 × 528.62
  4. Step 4: Simplify right side
    1,761.30x = 1,396,645.76
  5. Step 5: Solve for x
    x = 1,396,645.76/1,761.30
  6. Step 6: Final answer
    x = 792.96

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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.