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Finding the Fourth Proportional to 482.76, 666.15 and 305.66

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Solution

The fourth proportional to 482.76, 666.15 and 305.66 is: 421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.76 : 666.15 = 305.66 : x
  2. Step 2: Convert to fraction form
    482.76/666.15 = 305.66/x
  3. Step 3: Cross multiply
    482.76x = 666.15 × 305.66
  4. Step 4: Simplify right side
    482.76x = 203,612.08
  5. Step 5: Solve for x
    x = 203,612.08/482.76
  6. Step 6: Final answer
    x = 421.77

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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.