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Finding the Fourth Proportional to 619,009.70, 853,918.98 and 404,275.46

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Solution

The fourth proportional to 619,009.70, 853,918.98 and 404,275.46 is: 557,694.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,009.70 : 853,918.98 = 404,275.46 : x
  2. Step 2: Convert to fraction form
    619,009.70/853,918.98 = 404,275.46/x
  3. Step 3: Cross multiply
    619,009.70x = 853,918.98 × 404,275.46
  4. Step 4: Simplify right side
    619,009.70x = 345,218,484,172.64
  5. Step 5: Solve for x
    x = 345,218,484,172.64/619,009.70
  6. Step 6: Final answer
    x = 557,694.79

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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.