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Finding the Fourth Proportional to 495.78, 683.70 and 371.31

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Solution

The fourth proportional to 495.78, 683.70 and 371.31 is: 512.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.78 : 683.70 = 371.31 : x
  2. Step 2: Convert to fraction form
    495.78/683.70 = 371.31/x
  3. Step 3: Cross multiply
    495.78x = 683.70 × 371.31
  4. Step 4: Simplify right side
    495.78x = 253,864.65
  5. Step 5: Solve for x
    x = 253,864.65/495.78
  6. Step 6: Final answer
    x = 512.05

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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.