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Finding the Fourth Proportional to 440.35, 608.85 and 385.69

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Solution

The fourth proportional to 440.35, 608.85 and 385.69 is: 533.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.35 : 608.85 = 385.69 : x
  2. Step 2: Convert to fraction form
    440.35/608.85 = 385.69/x
  3. Step 3: Cross multiply
    440.35x = 608.85 × 385.69
  4. Step 4: Simplify right side
    440.35x = 234,827.36
  5. Step 5: Solve for x
    x = 234,827.36/440.35
  6. Step 6: Final answer
    x = 533.27

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Double scale
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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.