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Finding the Fourth Proportional to 404,287.90, 606,431.85 and 278,316.70

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Solution

The fourth proportional to 404,287.90, 606,431.85 and 278,316.70 is: 417,475.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,287.90 : 606,431.85 = 278,316.70 : x
  2. Step 2: Convert to fraction form
    404,287.90/606,431.85 = 278,316.70/x
  3. Step 3: Cross multiply
    404,287.90x = 606,431.85 × 278,316.70
  4. Step 4: Simplify right side
    404,287.90x = 168,780,111,266.90
  5. Step 5: Solve for x
    x = 168,780,111,266.90/404,287.90
  6. Step 6: Final answer
    x = 417,475.05

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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.