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Finding the Fourth Proportional to 495.53, 683.91 and 309.08

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Solution

The fourth proportional to 495.53, 683.91 and 309.08 is: 426.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.53 : 683.91 = 309.08 : x
  2. Step 2: Convert to fraction form
    495.53/683.91 = 309.08/x
  3. Step 3: Cross multiply
    495.53x = 683.91 × 309.08
  4. Step 4: Simplify right side
    495.53x = 211,385.24
  5. Step 5: Solve for x
    x = 211,385.24/495.53
  6. Step 6: Final answer
    x = 426.58

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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.