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Finding the Fourth Proportional to 651.02, 975.40 and 407

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Solution

The fourth proportional to 651.02, 975.40 and 407 is: 609.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.02 : 975.40 = 407 : x
  2. Step 2: Convert to fraction form
    651.02/975.40 = 407/x
  3. Step 3: Cross multiply
    651.02x = 975.40 × 407
  4. Step 4: Simplify right side
    651.02x = 396,987.80
  5. Step 5: Solve for x
    x = 396,987.80/651.02
  6. Step 6: Final answer
    x = 609.79

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