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Finding the Fourth Proportional to 722,577.72, 997,213.50 and 400,317.60

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Solution

The fourth proportional to 722,577.72, 997,213.50 and 400,317.60 is: 552,469.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,577.72 : 997,213.50 = 400,317.60 : x
  2. Step 2: Convert to fraction form
    722,577.72/997,213.50 = 400,317.60/x
  3. Step 3: Cross multiply
    722,577.72x = 997,213.50 × 400,317.60
  4. Step 4: Simplify right side
    722,577.72x = 399,202,115,007.60
  5. Step 5: Solve for x
    x = 399,202,115,007.60/722,577.72
  6. Step 6: Final answer
    x = 552,469.45

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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.