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Finding the Fourth Proportional to 722,694.70, 997,326.71 and 400,409.88

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Solution

The fourth proportional to 722,694.70, 997,326.71 and 400,409.88 is: 552,570.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,694.70 : 997,326.71 = 400,409.88 : x
  2. Step 2: Convert to fraction form
    722,694.70/997,326.71 = 400,409.88/x
  3. Step 3: Cross multiply
    722,694.70x = 997,326.71 × 400,409.88
  4. Step 4: Simplify right side
    722,694.70x = 399,339,468,271.90
  5. Step 5: Solve for x
    x = 399,339,468,271.90/722,694.70
  6. Step 6: Final answer
    x = 552,570.08

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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.