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Finding the Fourth Proportional to 404,839.30, 554,627.30 and 389,699.80

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Solution

The fourth proportional to 404,839.30, 554,627.30 and 389,699.80 is: 533,886.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,839.30 : 554,627.30 = 389,699.80 : x
  2. Step 2: Convert to fraction form
    404,839.30/554,627.30 = 389,699.80/x
  3. Step 3: Cross multiply
    404,839.30x = 554,627.30 × 389,699.80
  4. Step 4: Simplify right side
    404,839.30x = 216,138,147,884.54
  5. Step 5: Solve for x
    x = 216,138,147,884.54/404,839.30
  6. Step 6: Final answer
    x = 533,886.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.