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Finding the Fourth Proportional to 723.10, 997.92 and 428.35

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Solution

The fourth proportional to 723.10, 997.92 and 428.35 is: 591.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.10 : 997.92 = 428.35 : x
  2. Step 2: Convert to fraction form
    723.10/997.92 = 428.35/x
  3. Step 3: Cross multiply
    723.10x = 997.92 × 428.35
  4. Step 4: Simplify right side
    723.10x = 427,459.03
  5. Step 5: Solve for x
    x = 427,459.03/723.10
  6. Step 6: Final answer
    x = 591.15

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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.