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Finding the Fourth Proportional to 417.86, 626.63 and 143.87

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Solution

The fourth proportional to 417.86, 626.63 and 143.87 is: 215.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.86 : 626.63 = 143.87 : x
  2. Step 2: Convert to fraction form
    417.86/626.63 = 143.87/x
  3. Step 3: Cross multiply
    417.86x = 626.63 × 143.87
  4. Step 4: Simplify right side
    417.86x = 90,155.18
  5. Step 5: Solve for x
    x = 90,155.18/417.86
  6. Step 6: Final answer
    x = 215.76

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