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Finding the Fourth Proportional to 574.76, 793.15 and 312.78

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Solution

The fourth proportional to 574.76, 793.15 and 312.78 is: 431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.76 : 793.15 = 312.78 : x
  2. Step 2: Convert to fraction form
    574.76/793.15 = 312.78/x
  3. Step 3: Cross multiply
    574.76x = 793.15 × 312.78
  4. Step 4: Simplify right side
    574.76x = 248,079.77
  5. Step 5: Solve for x
    x = 248,079.77/574.76
  6. Step 6: Final answer
    x = 431.62

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