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Finding the Fourth Proportional to 670.29, 924.93 and 390.48

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Solution

The fourth proportional to 670.29, 924.93 and 390.48 is: 538.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.29 : 924.93 = 390.48 : x
  2. Step 2: Convert to fraction form
    670.29/924.93 = 390.48/x
  3. Step 3: Cross multiply
    670.29x = 924.93 × 390.48
  4. Step 4: Simplify right side
    670.29x = 361,166.67
  5. Step 5: Solve for x
    x = 361,166.67/670.29
  6. Step 6: Final answer
    x = 538.82

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