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Finding the Fourth Proportional to 585.22, 875.46 and 438.88

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Solution

The fourth proportional to 585.22, 875.46 and 438.88 is: 656.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.22 : 875.46 = 438.88 : x
  2. Step 2: Convert to fraction form
    585.22/875.46 = 438.88/x
  3. Step 3: Cross multiply
    585.22x = 875.46 × 438.88
  4. Step 4: Simplify right side
    585.22x = 384,221.88
  5. Step 5: Solve for x
    x = 384,221.88/585.22
  6. Step 6: Final answer
    x = 656.54

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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.