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Finding the Fourth Proportional to 459.29, 634.11 and 317.75

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Solution

The fourth proportional to 459.29, 634.11 and 317.75 is: 438.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.29 : 634.11 = 317.75 : x
  2. Step 2: Convert to fraction form
    459.29/634.11 = 317.75/x
  3. Step 3: Cross multiply
    459.29x = 634.11 × 317.75
  4. Step 4: Simplify right side
    459.29x = 201,485.28
  5. Step 5: Solve for x
    x = 201,485.28/459.29
  6. Step 6: Final answer
    x = 438.69

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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.