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Finding the Fourth Proportional to 404,287.80, 606,431.70 and 278,316.60

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Solution

The fourth proportional to 404,287.80, 606,431.70 and 278,316.60 is: 417,474.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,287.80 : 606,431.70 = 278,316.60 : x
  2. Step 2: Convert to fraction form
    404,287.80/606,431.70 = 278,316.60/x
  3. Step 3: Cross multiply
    404,287.80x = 606,431.70 × 278,316.60
  4. Step 4: Simplify right side
    404,287.80x = 168,780,008,876.22
  5. Step 5: Solve for x
    x = 168,780,008,876.22/404,287.80
  6. Step 6: Final answer
    x = 417,474.90

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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.