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Finding the Fourth Proportional to 634.48, 875.09 and 458.09

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Solution

The fourth proportional to 634.48, 875.09 and 458.09 is: 631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.48 : 875.09 = 458.09 : x
  2. Step 2: Convert to fraction form
    634.48/875.09 = 458.09/x
  3. Step 3: Cross multiply
    634.48x = 875.09 × 458.09
  4. Step 4: Simplify right side
    634.48x = 400,869.98
  5. Step 5: Solve for x
    x = 400,869.98/634.48
  6. Step 6: Final answer
    x = 631.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.