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Finding the Fourth Proportional to 495, 683.22 and 288.12

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Solution

The fourth proportional to 495, 683.22 and 288.12 is: 397.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    495 : 683.22 = 288.12 : x
  2. Step 2: Convert to fraction form
    495/683.22 = 288.12/x
  3. Step 3: Cross multiply
    495x = 683.22 × 288.12
  4. Step 4: Simplify right side
    495x = 196,849.35
  5. Step 5: Solve for x
    x = 196,849.35/495
  6. Step 6: Final answer
    x = 397.68

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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.