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Finding the Fourth Proportional to 720.90, 994.73 and 410.40

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Solution

The fourth proportional to 720.90, 994.73 and 410.40 is: 566.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.90 : 994.73 = 410.40 : x
  2. Step 2: Convert to fraction form
    720.90/994.73 = 410.40/x
  3. Step 3: Cross multiply
    720.90x = 994.73 × 410.40
  4. Step 4: Simplify right side
    720.90x = 408,235.14
  5. Step 5: Solve for x
    x = 408,235.14/720.90
  6. Step 6: Final answer
    x = 566.29

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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.