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Finding the Fourth Proportional to 495.52, 683.90 and 288.52

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Solution

The fourth proportional to 495.52, 683.90 and 288.52 is: 398.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.52 : 683.90 = 288.52 : x
  2. Step 2: Convert to fraction form
    495.52/683.90 = 288.52/x
  3. Step 3: Cross multiply
    495.52x = 683.90 × 288.52
  4. Step 4: Simplify right side
    495.52x = 197,318.83
  5. Step 5: Solve for x
    x = 197,318.83/495.52
  6. Step 6: Final answer
    x = 398.21

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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.