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Finding the Fourth Proportional to 722,620.26, 997,187.55 and 400,335.42

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Solution

The fourth proportional to 722,620.26, 997,187.55 and 400,335.42 is: 552,447.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,620.26 : 997,187.55 = 400,335.42 : x
  2. Step 2: Convert to fraction form
    722,620.26/997,187.55 = 400,335.42/x
  3. Step 3: Cross multiply
    722,620.26x = 997,187.55 × 400,335.42
  4. Step 4: Simplify right side
    722,620.26x = 399,209,496,648.02
  5. Step 5: Solve for x
    x = 399,209,496,648.02/722,620.26
  6. Step 6: Final answer
    x = 552,447.14

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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.