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Finding the Fourth Proportional to 440.85, 609.54 and 386.18

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Solution

The fourth proportional to 440.85, 609.54 and 386.18 is: 533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.85 : 609.54 = 386.18 : x
  2. Step 2: Convert to fraction form
    440.85/609.54 = 386.18/x
  3. Step 3: Cross multiply
    440.85x = 609.54 × 386.18
  4. Step 4: Simplify right side
    440.85x = 235,387.18
  5. Step 5: Solve for x
    x = 235,387.18/440.85
  6. Step 6: Final answer
    x = 533.94

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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.