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Finding the Fourth Proportional to 404.92, 606.80 and 313.19

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Solution

The fourth proportional to 404.92, 606.80 and 313.19 is: 469.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.92 : 606.80 = 313.19 : x
  2. Step 2: Convert to fraction form
    404.92/606.80 = 313.19/x
  3. Step 3: Cross multiply
    404.92x = 606.80 × 313.19
  4. Step 4: Simplify right side
    404.92x = 190,043.69
  5. Step 5: Solve for x
    x = 190,043.69/404.92
  6. Step 6: Final answer
    x = 469.34

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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.