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Finding the Fourth Proportional to 404.07, 557.30 and 279.93

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Solution

The fourth proportional to 404.07, 557.30 and 279.93 is: 386.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.07 : 557.30 = 279.93 : x
  2. Step 2: Convert to fraction form
    404.07/557.30 = 279.93/x
  3. Step 3: Cross multiply
    404.07x = 557.30 × 279.93
  4. Step 4: Simplify right side
    404.07x = 156,003.59
  5. Step 5: Solve for x
    x = 156,003.59/404.07
  6. Step 6: Final answer
    x = 386.08

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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.