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Finding the Fourth Proportional to 345.11, 476.03 and 220.57

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Solution

The fourth proportional to 345.11, 476.03 and 220.57 is: 304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.11 : 476.03 = 220.57 : x
  2. Step 2: Convert to fraction form
    345.11/476.03 = 220.57/x
  3. Step 3: Cross multiply
    345.11x = 476.03 × 220.57
  4. Step 4: Simplify right side
    345.11x = 104,998.74
  5. Step 5: Solve for x
    x = 104,998.74/345.11
  6. Step 6: Final answer
    x = 304.25

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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.