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Finding the Fourth Proportional to 619.99, 855.66 and 358

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Solution

The fourth proportional to 619.99, 855.66 and 358 is: 494.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.99 : 855.66 = 358 : x
  2. Step 2: Convert to fraction form
    619.99/855.66 = 358/x
  3. Step 3: Cross multiply
    619.99x = 855.66 × 358
  4. Step 4: Simplify right side
    619.99x = 306,326.28
  5. Step 5: Solve for x
    x = 306,326.28/619.99
  6. Step 6: Final answer
    x = 494.08

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