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Finding the Fourth Proportional to 458.36, 632.64 and 318.33

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Solution

The fourth proportional to 458.36, 632.64 and 318.33 is: 439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.36 : 632.64 = 318.33 : x
  2. Step 2: Convert to fraction form
    458.36/632.64 = 318.33/x
  3. Step 3: Cross multiply
    458.36x = 632.64 × 318.33
  4. Step 4: Simplify right side
    458.36x = 201,386.80
  5. Step 5: Solve for x
    x = 201,386.80/458.36
  6. Step 6: Final answer
    x = 439.37

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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.