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Finding the Fourth Proportional to 714, 985.56 and 493

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Solution

The fourth proportional to 714, 985.56 and 493 is: 680.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    714 : 985.56 = 493 : x
  2. Step 2: Convert to fraction form
    714/985.56 = 493/x
  3. Step 3: Cross multiply
    714x = 985.56 × 493
  4. Step 4: Simplify right side
    714x = 485,881.08
  5. Step 5: Solve for x
    x = 485,881.08/714
  6. Step 6: Final answer
    x = 680.51

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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.