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Finding the Fourth Proportional to 495.55, 743.53 and 312.90

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Solution

The fourth proportional to 495.55, 743.53 and 312.90 is: 469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.55 : 743.53 = 312.90 : x
  2. Step 2: Convert to fraction form
    495.55/743.53 = 312.90/x
  3. Step 3: Cross multiply
    495.55x = 743.53 × 312.90
  4. Step 4: Simplify right side
    495.55x = 232,650.54
  5. Step 5: Solve for x
    x = 232,650.54/495.55
  6. Step 6: Final answer
    x = 469.48

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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.