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Finding the Fourth Proportional to 458.04, 686.90 and 214.76

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Solution

The fourth proportional to 458.04, 686.90 and 214.76 is: 322.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.04 : 686.90 = 214.76 : x
  2. Step 2: Convert to fraction form
    458.04/686.90 = 214.76/x
  3. Step 3: Cross multiply
    458.04x = 686.90 × 214.76
  4. Step 4: Simplify right side
    458.04x = 147,518.64
  5. Step 5: Solve for x
    x = 147,518.64/458.04
  6. Step 6: Final answer
    x = 322.06

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