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Finding the Fourth Proportional to 404.77, 557.49 and 403.57

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Solution

The fourth proportional to 404.77, 557.49 and 403.57 is: 555.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.77 : 557.49 = 403.57 : x
  2. Step 2: Convert to fraction form
    404.77/557.49 = 403.57/x
  3. Step 3: Cross multiply
    404.77x = 557.49 × 403.57
  4. Step 4: Simplify right side
    404.77x = 224,986.24
  5. Step 5: Solve for x
    x = 224,986.24/404.77
  6. Step 6: Final answer
    x = 555.84

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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.