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Finding the Fourth Proportional to 495.96, 685.44 and 385.32

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Solution

The fourth proportional to 495.96, 685.44 and 385.32 is: 532.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.96 : 685.44 = 385.32 : x
  2. Step 2: Convert to fraction form
    495.96/685.44 = 385.32/x
  3. Step 3: Cross multiply
    495.96x = 685.44 × 385.32
  4. Step 4: Simplify right side
    495.96x = 264,113.74
  5. Step 5: Solve for x
    x = 264,113.74/495.96
  6. Step 6: Final answer
    x = 532.53

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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.