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Finding the Fourth Proportional to 423.39, 631.11 and 404.94

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Solution

The fourth proportional to 423.39, 631.11 and 404.94 is: 603.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.39 : 631.11 = 404.94 : x
  2. Step 2: Convert to fraction form
    423.39/631.11 = 404.94/x
  3. Step 3: Cross multiply
    423.39x = 631.11 × 404.94
  4. Step 4: Simplify right side
    423.39x = 255,561.68
  5. Step 5: Solve for x
    x = 255,561.68/423.39
  6. Step 6: Final answer
    x = 603.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.