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Finding the Fourth Proportional to 315,449.40, 435,326.76 and 172,215.48

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Solution

The fourth proportional to 315,449.40, 435,326.76 and 172,215.48 is: 237,660.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,449.40 : 435,326.76 = 172,215.48 : x
  2. Step 2: Convert to fraction form
    315,449.40/435,326.76 = 172,215.48/x
  3. Step 3: Cross multiply
    315,449.40x = 435,326.76 × 172,215.48
  4. Step 4: Simplify right side
    315,449.40x = 74,970,006,930.24
  5. Step 5: Solve for x
    x = 74,970,006,930.24/315,449.40
  6. Step 6: Final answer
    x = 237,660.96

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