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Finding the Fourth Proportional to 476.02, 656.81 and 279.48

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Solution

The fourth proportional to 476.02, 656.81 and 279.48 is: 385.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.02 : 656.81 = 279.48 : x
  2. Step 2: Convert to fraction form
    476.02/656.81 = 279.48/x
  3. Step 3: Cross multiply
    476.02x = 656.81 × 279.48
  4. Step 4: Simplify right side
    476.02x = 183,563.86
  5. Step 5: Solve for x
    x = 183,563.86/476.02
  6. Step 6: Final answer
    x = 385.62

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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.