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Finding the Fourth Proportional to 722,568.05, 997,143.93 and 400,299.02

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Solution

The fourth proportional to 722,568.05, 997,143.93 and 400,299.02 is: 552,412.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,568.05 : 997,143.93 = 400,299.02 : x
  2. Step 2: Convert to fraction form
    722,568.05/997,143.93 = 400,299.02/x
  3. Step 3: Cross multiply
    722,568.05x = 997,143.93 × 400,299.02
  4. Step 4: Simplify right side
    722,568.05x = 399,155,741,214.61
  5. Step 5: Solve for x
    x = 399,155,741,214.61/722,568.05
  6. Step 6: Final answer
    x = 552,412.66

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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.