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Finding the Fourth Proportional to 404.08, 557.22 and 330.16

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Solution

The fourth proportional to 404.08, 557.22 and 330.16 is: 455.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.08 : 557.22 = 330.16 : x
  2. Step 2: Convert to fraction form
    404.08/557.22 = 330.16/x
  3. Step 3: Cross multiply
    404.08x = 557.22 × 330.16
  4. Step 4: Simplify right side
    404.08x = 183,971.76
  5. Step 5: Solve for x
    x = 183,971.76/404.08
  6. Step 6: Final answer
    x = 455.29

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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.