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Finding the Fourth Proportional to 404,627.10, 606,940.65 and 278,655.90

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Solution

The fourth proportional to 404,627.10, 606,940.65 and 278,655.90 is: 417,983.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,627.10 : 606,940.65 = 278,655.90 : x
  2. Step 2: Convert to fraction form
    404,627.10/606,940.65 = 278,655.90/x
  3. Step 3: Cross multiply
    404,627.10x = 606,940.65 × 278,655.90
  4. Step 4: Simplify right side
    404,627.10x = 169,127,593,072.34
  5. Step 5: Solve for x
    x = 169,127,593,072.34/404,627.10
  6. Step 6: Final answer
    x = 417,983.85

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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.