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Finding the Fourth Proportional to 722,808, 997,496.91 and 400,487.94

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Solution

The fourth proportional to 722,808, 997,496.91 and 400,487.94 is: 552,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,808 : 997,496.91 = 400,487.94 : x
  2. Step 2: Convert to fraction form
    722,808/997,496.91 = 400,487.94/x
  3. Step 3: Cross multiply
    722,808x = 997,496.91 × 400,487.94
  4. Step 4: Simplify right side
    722,808x = 399,485,482,642.27
  5. Step 5: Solve for x
    x = 399,485,482,642.27/722,808
  6. Step 6: Final answer
    x = 552,685.47

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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.