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Finding the Fourth Proportional to 722,481.52, 996,980.64 and 400,172.80

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Solution

The fourth proportional to 722,481.52, 996,980.64 and 400,172.80 is: 552,214.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,481.52 : 996,980.64 = 400,172.80 : x
  2. Step 2: Convert to fraction form
    722,481.52/996,980.64 = 400,172.80/x
  3. Step 3: Cross multiply
    722,481.52x = 996,980.64 × 400,172.80
  4. Step 4: Simplify right side
    722,481.52x = 398,964,534,254.59
  5. Step 5: Solve for x
    x = 398,964,534,254.59/722,481.52
  6. Step 6: Final answer
    x = 552,214.17

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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.