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Finding the Fourth Proportional to 509.11, 702.50 and 288.03

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Solution

The fourth proportional to 509.11, 702.50 and 288.03 is: 397.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.11 : 702.50 = 288.03 : x
  2. Step 2: Convert to fraction form
    509.11/702.50 = 288.03/x
  3. Step 3: Cross multiply
    509.11x = 702.50 × 288.03
  4. Step 4: Simplify right side
    509.11x = 202,341.08
  5. Step 5: Solve for x
    x = 202,341.08/509.11
  6. Step 6: Final answer
    x = 397.44

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