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Finding the Fourth Proportional to 495.48, 681.78 and 480.46

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Solution

The fourth proportional to 495.48, 681.78 and 480.46 is: 661.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.48 : 681.78 = 480.46 : x
  2. Step 2: Convert to fraction form
    495.48/681.78 = 480.46/x
  3. Step 3: Cross multiply
    495.48x = 681.78 × 480.46
  4. Step 4: Simplify right side
    495.48x = 327,568.02
  5. Step 5: Solve for x
    x = 327,568.02/495.48
  6. Step 6: Final answer
    x = 661.11

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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.