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Finding the Fourth Proportional to 465.37, 641.86 and 317.75

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Solution

The fourth proportional to 465.37, 641.86 and 317.75 is: 438.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.37 : 641.86 = 317.75 : x
  2. Step 2: Convert to fraction form
    465.37/641.86 = 317.75/x
  3. Step 3: Cross multiply
    465.37x = 641.86 × 317.75
  4. Step 4: Simplify right side
    465.37x = 203,947.01
  5. Step 5: Solve for x
    x = 203,947.01/465.37
  6. Step 6: Final answer
    x = 438.25

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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.