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Finding the Fourth Proportional to 495.54, 684.72 and 355.41

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Solution

The fourth proportional to 495.54, 684.72 and 355.41 is: 491.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.54 : 684.72 = 355.41 : x
  2. Step 2: Convert to fraction form
    495.54/684.72 = 355.41/x
  3. Step 3: Cross multiply
    495.54x = 684.72 × 355.41
  4. Step 4: Simplify right side
    495.54x = 243,356.34
  5. Step 5: Solve for x
    x = 243,356.34/495.54
  6. Step 6: Final answer
    x = 491.09

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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.