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Finding the Fourth Proportional to 651.63, 978.65 and 392.18

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Solution

The fourth proportional to 651.63, 978.65 and 392.18 is: 589.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.63 : 978.65 = 392.18 : x
  2. Step 2: Convert to fraction form
    651.63/978.65 = 392.18/x
  3. Step 3: Cross multiply
    651.63x = 978.65 × 392.18
  4. Step 4: Simplify right side
    651.63x = 383,806.96
  5. Step 5: Solve for x
    x = 383,806.96/651.63
  6. Step 6: Final answer
    x = 589.00

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