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Finding the Fourth Proportional to 495.16, 683.16 and 285.36

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Solution

The fourth proportional to 495.16, 683.16 and 285.36 is: 393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.16 : 683.16 = 285.36 : x
  2. Step 2: Convert to fraction form
    495.16/683.16 = 285.36/x
  3. Step 3: Cross multiply
    495.16x = 683.16 × 285.36
  4. Step 4: Simplify right side
    495.16x = 194,946.54
  5. Step 5: Solve for x
    x = 194,946.54/495.16
  6. Step 6: Final answer
    x = 393.70

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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.