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Finding the Fourth Proportional to 722,969.71, 997,698.18 and 400,728.22

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Solution

The fourth proportional to 722,969.71, 997,698.18 and 400,728.22 is: 553,004.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,969.71 : 997,698.18 = 400,728.22 : x
  2. Step 2: Convert to fraction form
    722,969.71/997,698.18 = 400,728.22/x
  3. Step 3: Cross multiply
    722,969.71x = 997,698.18 × 400,728.22
  4. Step 4: Simplify right side
    722,969.71x = 399,805,815,768.64
  5. Step 5: Solve for x
    x = 399,805,815,768.64/722,969.71
  6. Step 6: Final answer
    x = 553,004.93

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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.