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Finding the Fourth Proportional to 723.59, 998.56 and 392.02

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Solution

The fourth proportional to 723.59, 998.56 and 392.02 is: 540.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.59 : 998.56 = 392.02 : x
  2. Step 2: Convert to fraction form
    723.59/998.56 = 392.02/x
  3. Step 3: Cross multiply
    723.59x = 998.56 × 392.02
  4. Step 4: Simplify right side
    723.59x = 391,453.63
  5. Step 5: Solve for x
    x = 391,453.63/723.59
  6. Step 6: Final answer
    x = 540.99

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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.