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Finding the Fourth Proportional to 722,474.90, 997,015.43 and 400,205.87

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Solution

The fourth proportional to 722,474.90, 997,015.43 and 400,205.87 is: 552,284.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,474.90 : 997,015.43 = 400,205.87 : x
  2. Step 2: Convert to fraction form
    722,474.90/997,015.43 = 400,205.87/x
  3. Step 3: Cross multiply
    722,474.90x = 997,015.43 × 400,205.87
  4. Step 4: Simplify right side
    722,474.90x = 399,011,427,566.57
  5. Step 5: Solve for x
    x = 399,011,427,566.57/722,474.90
  6. Step 6: Final answer
    x = 552,284.14

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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.