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Finding the Fourth Proportional to 722,906.40, 997,613.40 and 400,622

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Solution

The fourth proportional to 722,906.40, 997,613.40 and 400,622 is: 552,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,906.40 : 997,613.40 = 400,622 : x
  2. Step 2: Convert to fraction form
    722,906.40/997,613.40 = 400,622/x
  3. Step 3: Cross multiply
    722,906.40x = 997,613.40 × 400,622
  4. Step 4: Simplify right side
    722,906.40x = 399,665,875,534.80
  5. Step 5: Solve for x
    x = 399,665,875,534.80/722,906.40
  6. Step 6: Final answer
    x = 552,859.78

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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.