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Finding the Fourth Proportional to 278.83, 417.48 and 210.15

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Solution

The fourth proportional to 278.83, 417.48 and 210.15 is: 314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.83 : 417.48 = 210.15 : x
  2. Step 2: Convert to fraction form
    278.83/417.48 = 210.15/x
  3. Step 3: Cross multiply
    278.83x = 417.48 × 210.15
  4. Step 4: Simplify right side
    278.83x = 87,732.64
  5. Step 5: Solve for x
    x = 87,732.64/278.83
  6. Step 6: Final answer
    x = 314.64

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