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Finding the Fourth Proportional to 722,520.50, 997,078.19 and 400,251.47

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Solution

The fourth proportional to 722,520.50, 997,078.19 and 400,251.47 is: 552,346.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,520.50 : 997,078.19 = 400,251.47 : x
  2. Step 2: Convert to fraction form
    722,520.50/997,078.19 = 400,251.47/x
  3. Step 3: Cross multiply
    722,520.50x = 997,078.19 × 400,251.47
  4. Step 4: Simplify right side
    722,520.50x = 399,082,004,265.79
  5. Step 5: Solve for x
    x = 399,082,004,265.79/722,520.50
  6. Step 6: Final answer
    x = 552,346.97

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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.