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Finding the Fourth Proportional to 550.15, 820.37 and 545.21

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Solution

The fourth proportional to 550.15, 820.37 and 545.21 is: 813.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.15 : 820.37 = 545.21 : x
  2. Step 2: Convert to fraction form
    550.15/820.37 = 545.21/x
  3. Step 3: Cross multiply
    550.15x = 820.37 × 545.21
  4. Step 4: Simplify right side
    550.15x = 447,277.34
  5. Step 5: Solve for x
    x = 447,277.34/550.15
  6. Step 6: Final answer
    x = 813.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.