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Finding the Fourth Proportional to 495.08, 742.04 and 312.20

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Solution

The fourth proportional to 495.08, 742.04 and 312.20 is: 467.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.08 : 742.04 = 312.20 : x
  2. Step 2: Convert to fraction form
    495.08/742.04 = 312.20/x
  3. Step 3: Cross multiply
    495.08x = 742.04 × 312.20
  4. Step 4: Simplify right side
    495.08x = 231,664.89
  5. Step 5: Solve for x
    x = 231,664.89/495.08
  6. Step 6: Final answer
    x = 467.93

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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.