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Finding the Fourth Proportional to 345.60, 476.28 and 323.28

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Solution

The fourth proportional to 345.60, 476.28 and 323.28 is: 445.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.60 : 476.28 = 323.28 : x
  2. Step 2: Convert to fraction form
    345.60/476.28 = 323.28/x
  3. Step 3: Cross multiply
    345.60x = 476.28 × 323.28
  4. Step 4: Simplify right side
    345.60x = 153,971.80
  5. Step 5: Solve for x
    x = 153,971.80/345.60
  6. Step 6: Final answer
    x = 445.52

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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.