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Finding the Fourth Proportional to 387.99, 581.58 and 171.45

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Solution

The fourth proportional to 387.99, 581.58 and 171.45 is: 257.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.99 : 581.58 = 171.45 : x
  2. Step 2: Convert to fraction form
    387.99/581.58 = 171.45/x
  3. Step 3: Cross multiply
    387.99x = 581.58 × 171.45
  4. Step 4: Simplify right side
    387.99x = 99,711.89
  5. Step 5: Solve for x
    x = 99,711.89/387.99
  6. Step 6: Final answer
    x = 257.00

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