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Finding the Fourth Proportional to 655.56, 984.71 and 553.05

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Solution

The fourth proportional to 655.56, 984.71 and 553.05 is: 830.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 984.71 = 553.05 : x
  2. Step 2: Convert to fraction form
    655.56/984.71 = 553.05/x
  3. Step 3: Cross multiply
    655.56x = 984.71 × 553.05
  4. Step 4: Simplify right side
    655.56x = 544,595.25
  5. Step 5: Solve for x
    x = 544,595.25/655.56
  6. Step 6: Final answer
    x = 830.73

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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.