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Finding the Fourth Proportional to 404.02, 557.46 and 279.48

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Solution

The fourth proportional to 404.02, 557.46 and 279.48 is: 385.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.02 : 557.46 = 279.48 : x
  2. Step 2: Convert to fraction form
    404.02/557.46 = 279.48/x
  3. Step 3: Cross multiply
    404.02x = 557.46 × 279.48
  4. Step 4: Simplify right side
    404.02x = 155,794.74
  5. Step 5: Solve for x
    x = 155,794.74/404.02
  6. Step 6: Final answer
    x = 385.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.