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Finding the Fourth Proportional to 575.77, 864.09 and 422.09

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Solution

The fourth proportional to 575.77, 864.09 and 422.09 is: 633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.77 : 864.09 = 422.09 : x
  2. Step 2: Convert to fraction form
    575.77/864.09 = 422.09/x
  3. Step 3: Cross multiply
    575.77x = 864.09 × 422.09
  4. Step 4: Simplify right side
    575.77x = 364,722.64
  5. Step 5: Solve for x
    x = 364,722.64/575.77
  6. Step 6: Final answer
    x = 633.45

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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.