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Finding the Fourth Proportional to 495.86, 743.36 and 312.80

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Solution

The fourth proportional to 495.86, 743.36 and 312.80 is: 468.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.86 : 743.36 = 312.80 : x
  2. Step 2: Convert to fraction form
    495.86/743.36 = 312.80/x
  3. Step 3: Cross multiply
    495.86x = 743.36 × 312.80
  4. Step 4: Simplify right side
    495.86x = 232,523.01
  5. Step 5: Solve for x
    x = 232,523.01/495.86
  6. Step 6: Final answer
    x = 468.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.