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Finding the Fourth Proportional to 722,980.80, 997,713.60 and 400,711.68

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Solution

The fourth proportional to 722,980.80, 997,713.60 and 400,711.68 is: 552,982.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,980.80 : 997,713.60 = 400,711.68 : x
  2. Step 2: Convert to fraction form
    722,980.80/997,713.60 = 400,711.68/x
  3. Step 3: Cross multiply
    722,980.80x = 997,713.60 × 400,711.68
  4. Step 4: Simplify right side
    722,980.80x = 399,795,492,814.85
  5. Step 5: Solve for x
    x = 399,795,492,814.85/722,980.80
  6. Step 6: Final answer
    x = 552,982.17

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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.