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Finding the Fourth Proportional to 404,223.80, 606,335.70 and 278,252.60

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Solution

The fourth proportional to 404,223.80, 606,335.70 and 278,252.60 is: 417,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,223.80 : 606,335.70 = 278,252.60 : x
  2. Step 2: Convert to fraction form
    404,223.80/606,335.70 = 278,252.60/x
  3. Step 3: Cross multiply
    404,223.80x = 606,335.70 × 278,252.60
  4. Step 4: Simplify right side
    404,223.80x = 168,714,484,997.82
  5. Step 5: Solve for x
    x = 168,714,484,997.82/404,223.80
  6. Step 6: Final answer
    x = 417,378.90

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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.