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Finding the Fourth Proportional to 577.82, 864.68 and 423.36

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Solution

The fourth proportional to 577.82, 864.68 and 423.36 is: 633.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.82 : 864.68 = 423.36 : x
  2. Step 2: Convert to fraction form
    577.82/864.68 = 423.36/x
  3. Step 3: Cross multiply
    577.82x = 864.68 × 423.36
  4. Step 4: Simplify right side
    577.82x = 366,070.92
  5. Step 5: Solve for x
    x = 366,070.92/577.82
  6. Step 6: Final answer
    x = 633.54

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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.