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Finding the Fourth Proportional to 404.51, 606.78 and 383.45

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Solution

The fourth proportional to 404.51, 606.78 and 383.45 is: 575.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.51 : 606.78 = 383.45 : x
  2. Step 2: Convert to fraction form
    404.51/606.78 = 383.45/x
  3. Step 3: Cross multiply
    404.51x = 606.78 × 383.45
  4. Step 4: Simplify right side
    404.51x = 232,669.79
  5. Step 5: Solve for x
    x = 232,669.79/404.51
  6. Step 6: Final answer
    x = 575.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.