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Finding the Fourth Proportional to 722,957.85, 997,715.49 and 400,668

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Solution

The fourth proportional to 722,957.85, 997,715.49 and 400,668 is: 552,940.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,957.85 : 997,715.49 = 400,668 : x
  2. Step 2: Convert to fraction form
    722,957.85/997,715.49 = 400,668/x
  3. Step 3: Cross multiply
    722,957.85x = 997,715.49 × 400,668
  4. Step 4: Simplify right side
    722,957.85x = 399,752,669,947.32
  5. Step 5: Solve for x
    x = 399,752,669,947.32/722,957.85
  6. Step 6: Final answer
    x = 552,940.49

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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.