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Finding the Fourth Proportional to 478.72, 661 and 368.02

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Solution

The fourth proportional to 478.72, 661 and 368.02 is: 508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.72 : 661 = 368.02 : x
  2. Step 2: Convert to fraction form
    478.72/661 = 368.02/x
  3. Step 3: Cross multiply
    478.72x = 661 × 368.02
  4. Step 4: Simplify right side
    478.72x = 243,261.22
  5. Step 5: Solve for x
    x = 243,261.22/478.72
  6. Step 6: Final answer
    x = 508.15

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