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Finding the Fourth Proportional to 404,634.80, 606,952.20 and 278,663.60

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Solution

The fourth proportional to 404,634.80, 606,952.20 and 278,663.60 is: 417,995.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,634.80 : 606,952.20 = 278,663.60 : x
  2. Step 2: Convert to fraction form
    404,634.80/606,952.20 = 278,663.60/x
  3. Step 3: Cross multiply
    404,634.80x = 606,952.20 × 278,663.60
  4. Step 4: Simplify right side
    404,634.80x = 169,135,485,079.92
  5. Step 5: Solve for x
    x = 169,135,485,079.92/404,634.80
  6. Step 6: Final answer
    x = 417,995.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.