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Finding the Fourth Proportional to 710.55, 980.24 and 497.86

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Solution

The fourth proportional to 710.55, 980.24 and 497.86 is: 686.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.55 : 980.24 = 497.86 : x
  2. Step 2: Convert to fraction form
    710.55/980.24 = 497.86/x
  3. Step 3: Cross multiply
    710.55x = 980.24 × 497.86
  4. Step 4: Simplify right side
    710.55x = 488,017.35
  5. Step 5: Solve for x
    x = 488,017.35/710.55
  6. Step 6: Final answer
    x = 686.82

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