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Finding the Fourth Proportional to 1,717.05, 2,575.31 and 620.85

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Solution

The fourth proportional to 1,717.05, 2,575.31 and 620.85 is: 931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.05 : 2,575.31 = 620.85 : x
  2. Step 2: Convert to fraction form
    1,717.05/2,575.31 = 620.85/x
  3. Step 3: Cross multiply
    1,717.05x = 2,575.31 × 620.85
  4. Step 4: Simplify right side
    1,717.05x = 1,598,878.11
  5. Step 5: Solve for x
    x = 1,598,878.11/1,717.05
  6. Step 6: Final answer
    x = 931.18

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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.