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Finding the Fourth Proportional to 720.98, 994.14 and 511.22

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Solution

The fourth proportional to 720.98, 994.14 and 511.22 is: 704.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.98 : 994.14 = 511.22 : x
  2. Step 2: Convert to fraction form
    720.98/994.14 = 511.22/x
  3. Step 3: Cross multiply
    720.98x = 994.14 × 511.22
  4. Step 4: Simplify right side
    720.98x = 508,224.25
  5. Step 5: Solve for x
    x = 508,224.25/720.98
  6. Step 6: Final answer
    x = 704.91

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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.