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Finding the Fourth Proportional to 577.99, 861.98 and 550.45

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Solution

The fourth proportional to 577.99, 861.98 and 550.45 is: 820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.99 : 861.98 = 550.45 : x
  2. Step 2: Convert to fraction form
    577.99/861.98 = 550.45/x
  3. Step 3: Cross multiply
    577.99x = 861.98 × 550.45
  4. Step 4: Simplify right side
    577.99x = 474,476.89
  5. Step 5: Solve for x
    x = 474,476.89/577.99
  6. Step 6: Final answer
    x = 820.91

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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.