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Finding the Fourth Proportional to 659.72, 989.86 and 294.68

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Solution

The fourth proportional to 659.72, 989.86 and 294.68 is: 442.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.72 : 989.86 = 294.68 : x
  2. Step 2: Convert to fraction form
    659.72/989.86 = 294.68/x
  3. Step 3: Cross multiply
    659.72x = 989.86 × 294.68
  4. Step 4: Simplify right side
    659.72x = 291,691.94
  5. Step 5: Solve for x
    x = 291,691.94/659.72
  6. Step 6: Final answer
    x = 442.15

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