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Finding the Fourth Proportional to 495.77, 684.48 and 318.82

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Solution

The fourth proportional to 495.77, 684.48 and 318.82 is: 440.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.77 : 684.48 = 318.82 : x
  2. Step 2: Convert to fraction form
    495.77/684.48 = 318.82/x
  3. Step 3: Cross multiply
    495.77x = 684.48 × 318.82
  4. Step 4: Simplify right side
    495.77x = 218,220.90
  5. Step 5: Solve for x
    x = 218,220.90/495.77
  6. Step 6: Final answer
    x = 440.17

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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.