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Finding the Fourth Proportional to 883, 1,217.34 and 620.56

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Solution

The fourth proportional to 883, 1,217.34 and 620.56 is: 855.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    883 : 1,217.34 = 620.56 : x
  2. Step 2: Convert to fraction form
    883/1,217.34 = 620.56/x
  3. Step 3: Cross multiply
    883x = 1,217.34 × 620.56
  4. Step 4: Simplify right side
    883x = 755,432.51
  5. Step 5: Solve for x
    x = 755,432.51/883
  6. Step 6: Final answer
    x = 855.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.