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Finding the Fourth Proportional to 313.88, 432.75 and 215.47

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Solution

The fourth proportional to 313.88, 432.75 and 215.47 is: 297.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.88 : 432.75 = 215.47 : x
  2. Step 2: Convert to fraction form
    313.88/432.75 = 215.47/x
  3. Step 3: Cross multiply
    313.88x = 432.75 × 215.47
  4. Step 4: Simplify right side
    313.88x = 93,244.64
  5. Step 5: Solve for x
    x = 93,244.64/313.88
  6. Step 6: Final answer
    x = 297.07

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