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Finding the Fourth Proportional to 653.32, 978.54 and 435.88

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Solution

The fourth proportional to 653.32, 978.54 and 435.88 is: 652.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.32 : 978.54 = 435.88 : x
  2. Step 2: Convert to fraction form
    653.32/978.54 = 435.88/x
  3. Step 3: Cross multiply
    653.32x = 978.54 × 435.88
  4. Step 4: Simplify right side
    653.32x = 426,526.02
  5. Step 5: Solve for x
    x = 426,526.02/653.32
  6. Step 6: Final answer
    x = 652.86

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