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Finding the Fourth Proportional to 722,487.67, 997,065.81 and 400,197.73

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Solution

The fourth proportional to 722,487.67, 997,065.81 and 400,197.73 is: 552,291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,487.67 : 997,065.81 = 400,197.73 : x
  2. Step 2: Convert to fraction form
    722,487.67/997,065.81 = 400,197.73/x
  3. Step 3: Cross multiply
    722,487.67x = 997,065.81 × 400,197.73
  4. Step 4: Simplify right side
    722,487.67x = 399,023,473,822.61
  5. Step 5: Solve for x
    x = 399,023,473,822.61/722,487.67
  6. Step 6: Final answer
    x = 552,291.05

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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.