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Finding the Fourth Proportional to 476.40, 656.95 and 343.56

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Solution

The fourth proportional to 476.40, 656.95 and 343.56 is: 473.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.40 : 656.95 = 343.56 : x
  2. Step 2: Convert to fraction form
    476.40/656.95 = 343.56/x
  3. Step 3: Cross multiply
    476.40x = 656.95 × 343.56
  4. Step 4: Simplify right side
    476.40x = 225,701.74
  5. Step 5: Solve for x
    x = 225,701.74/476.40
  6. Step 6: Final answer
    x = 473.77

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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.