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Finding the Fourth Proportional to 647.05, 970.05 and 281.59

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Solution

The fourth proportional to 647.05, 970.05 and 281.59 is: 422.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.05 : 970.05 = 281.59 : x
  2. Step 2: Convert to fraction form
    647.05/970.05 = 281.59/x
  3. Step 3: Cross multiply
    647.05x = 970.05 × 281.59
  4. Step 4: Simplify right side
    647.05x = 273,156.38
  5. Step 5: Solve for x
    x = 273,156.38/647.05
  6. Step 6: Final answer
    x = 422.16

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