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Finding the Fourth Proportional to 579.74, 800.05 and 317.75

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Solution

The fourth proportional to 579.74, 800.05 and 317.75 is: 438.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.74 : 800.05 = 317.75 : x
  2. Step 2: Convert to fraction form
    579.74/800.05 = 317.75/x
  3. Step 3: Cross multiply
    579.74x = 800.05 × 317.75
  4. Step 4: Simplify right side
    579.74x = 254,215.89
  5. Step 5: Solve for x
    x = 254,215.89/579.74
  6. Step 6: Final answer
    x = 438.50

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