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Finding the Fourth Proportional to 714.84, 987.03 and 518.82

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Solution

The fourth proportional to 714.84, 987.03 and 518.82 is: 716.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.84 : 987.03 = 518.82 : x
  2. Step 2: Convert to fraction form
    714.84/987.03 = 518.82/x
  3. Step 3: Cross multiply
    714.84x = 987.03 × 518.82
  4. Step 4: Simplify right side
    714.84x = 512,090.90
  5. Step 5: Solve for x
    x = 512,090.90/714.84
  6. Step 6: Final answer
    x = 716.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.