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Finding the Fourth Proportional to 482.55, 665.78 and 342.69

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Solution

The fourth proportional to 482.55, 665.78 and 342.69 is: 472.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.55 : 665.78 = 342.69 : x
  2. Step 2: Convert to fraction form
    482.55/665.78 = 342.69/x
  3. Step 3: Cross multiply
    482.55x = 665.78 × 342.69
  4. Step 4: Simplify right side
    482.55x = 228,156.15
  5. Step 5: Solve for x
    x = 228,156.15/482.55
  6. Step 6: Final answer
    x = 472.81

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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.