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Finding the Fourth Proportional to 440.21, 606.79 and 346.81

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Solution

The fourth proportional to 440.21, 606.79 and 346.81 is: 478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.21 : 606.79 = 346.81 : x
  2. Step 2: Convert to fraction form
    440.21/606.79 = 346.81/x
  3. Step 3: Cross multiply
    440.21x = 606.79 × 346.81
  4. Step 4: Simplify right side
    440.21x = 210,440.84
  5. Step 5: Solve for x
    x = 210,440.84/440.21
  6. Step 6: Final answer
    x = 478.05

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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.