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Finding the Fourth Proportional to 722,475.39, 997,048.86 and 400,185.45

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Solution

The fourth proportional to 722,475.39, 997,048.86 and 400,185.45 is: 552,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,475.39 : 997,048.86 = 400,185.45 : x
  2. Step 2: Convert to fraction form
    722,475.39/997,048.86 = 400,185.45/x
  3. Step 3: Cross multiply
    722,475.39x = 997,048.86 × 400,185.45
  4. Step 4: Simplify right side
    722,475.39x = 399,004,446,711.09
  5. Step 5: Solve for x
    x = 399,004,446,711.09/722,475.39
  6. Step 6: Final answer
    x = 552,274.10

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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.