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Finding the Fourth Proportional to 558.51, 772.11 and 553.26

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Solution

The fourth proportional to 558.51, 772.11 and 553.26 is: 764.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.51 : 772.11 = 553.26 : x
  2. Step 2: Convert to fraction form
    558.51/772.11 = 553.26/x
  3. Step 3: Cross multiply
    558.51x = 772.11 × 553.26
  4. Step 4: Simplify right side
    558.51x = 427,177.58
  5. Step 5: Solve for x
    x = 427,177.58/558.51
  6. Step 6: Final answer
    x = 764.85

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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.